Attention: Thomas Mutryn EVP & CFO Telephone No.: (703) 841-4488 Facsimile No.: (703) 522-6895

Exhibit 4.5

EXECUTION COPY

JPMorgan Chase Bank, National Association

X.X. Xxx 000

60 Victoria Embankment

Xxxxxx XX0X 0XX

England

May 10, 2007

To: CACI International Inc

0000 Xxxxx Xxxxx Xxxx

Xxxxxxxxx, XX 00000

Attention:		Xxxxxx Xxxxxx
		EVP & CFO
Telephone No.:		(000) 000-0000
Facsimile No.:		(000) 000-0000

Re: Call Option Transaction

The purpose of this letter agreement (this “Confirmation”) is to confirm the terms and conditions of the call option transaction entered into between JPMorgan Chase Bank, National Association, London Branch (“Dealer”) and CACI International Inc (“Counterparty”) on the Trade Date specified below (the “Transaction”). This letter agreement constitutes a “Confirmation” as referred to in the ISDA Master Agreement specified below. This Confirmation shall replace any previous agreements and serve as the final documentation for this Transaction.

The definitions and provisions contained in the 2002 ISDA Equity Derivatives Definitions (the “Equity Definitions”), as published by the International Swaps and Derivatives Association, Inc. (“ISDA”), are incorporated into this Confirmation. In the event of any inconsistency between the Equity Definitions and this Confirmation, this Confirmation shall govern. Certain defined terms used herein have the meanings assigned to them in the Offering Memorandum dated May 10, 2007 (the “Offering Memorandum”) relating to the USD 270,000,000 principal amount of Convertible Senior Subordinated Notes due 2014, (the “Convertible Notes” and each USD 1,000 principal amount of Convertible Notes, a “Convertible Note”) issued by Counterparty pursuant to an Indenture to be dated May 16, 2007 between Counterparty and The Bank of New York, as trustee (the “Indenture”). In the event of any inconsistency between the terms defined in the Offering Memorandum, the Indenture and this Confirmation, this Confirmation shall govern. The parties acknowledge that this Confirmation is entered into on the date hereof with the understanding that (i) definitions set forth in the Indenture which are also defined herein by reference to the Indenture and (ii) sections of the Indenture that are referred to herein will conform to the descriptions thereof in the Offering Memorandum. If any such definitions in the Indenture or any such sections of the Indenture differ from the descriptions thereof in the Offering Memorandum, the descriptions thereof in the Offering Memorandum will govern for purposes of this Confirmation. The parties further acknowledge that the Indenture section numbers used herein are based on the draft of the Indenture dated May 8, 2007, and if any such section numbers are changed in the Indenture as executed, the parties will amend this Confirmation in good faith to preserve the intent of the parties. For the avoidance of doubt, references to the Indenture herein are references to the Indenture as in effect on the date of its execution and if the Indenture is amended following its execution, any such amendment will be disregarded for purposes of this Confirmation unless the parties agree otherwise in writing.

Each party is hereby advised, and each such party acknowledges, that the other party has engaged in, or refrained from engaging in, substantial financial transactions and has taken other material actions in reliance upon the parties’ entry into the Transaction to which this Confirmation relates on the terms and conditions set forth below.

JPMorgan Chase Bank, National Association

Organised under the laws of the United States as a National Banking Association.

Main Xxxxxx 0000 Xxxxxxx Xxxxxxx, Xxxxxxxx, Xxxx 00000

Registered as a branch in England & Wales branch No. BR000746. Registered

Branch Office 000 Xxxxxx Xxxx, Xxxxxx XX0X 0XX

Authorised and regulated by the Financial Services Authority

1. This Confirmation evidences a complete and binding agreement between Dealer and Counterparty as to the terms of the Transaction to which this Confirmation relates. This Confirmation shall supplement, form a part of, and be subject to an agreement in the form of the 2002 ISDA Master Agreement (the “Agreement”) as if Dealer and Counterparty had executed an agreement in such form (but without any Schedule except for the election of the laws of the State of New York as the governing law) on the Trade Date. In the event of any inconsistency between provisions of that Agreement and this Confirmation, this Confirmation will prevail for the purpose of the Transaction to which this Confirmation relates. The parties hereby agree that no Transaction other than the Transaction to which this Confirmation relates shall be governed by the Agreement.

2. The terms of the particular Transaction to which this Confirmation relates are as follows:

General Terms:

Trade Date:		May 10, 2007
Option Style:		“Modified American”, as described under “Procedures for Exercise” below
Option Type:		Call
Buyer:		Counterparty
Seller:		Dealer
Shares:		The common stock of Counterparty, par value USD 0.10 per Share (Exchange symbol “CAI”)
Number of Options:		67,500. For the avoidance of doubt, the Number of Options shall be reduced by any Options exercised by Counterparty. In no event will the Number of Options be less than zero.
Option Entitlement:		As of any date, a number equal to the Conversion Rate as of such date (as defined in the Indenture, but without regard to any adjustments to the Conversion Rate pursuant to Section 6.04(h) of the Indenture), for each Convertible Note.
Strike Price:		USD 54.6480
Premium:		USD 18,981,000.00
Premium Payment Date:		May 16, 2007
Exchange:		The New York Stock Exchange
Related Exchange(s):		All Exchanges

Procedures for Exercise:

Exercise Period(s): Notwithstanding anything to the contrary in the Equity Definitions, an Exercise Period shall occur with respect to an Option hereunder only if such Option is an Exercisable Option (as defined below) and the Exercise Period shall be, in respect of any Exercisable Option, the

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		period commencing on, and including, the relevant Conversion Date and ending on, and including, the Scheduled Valid Day immediately preceding the first day of the relevant Settlement Averaging Period in respect of such Conversion Date; provided that in respect of Exercisable Options relating to Convertible Notes tendered for conversion on or following February 19, 2014, the final day of the Exercise Period shall be the second Scheduled Valid Day immediately preceding the Expiration Date.
Conversion Date:		With respect to any conversion of Convertible Notes, the date on which the Holder (as such term is defined in the Indenture) of such Convertible Notes satisfies all of the requirements for conversion thereof as set forth in Section 6.02(b) of the Indenture.
Exercisable Options:		In respect of each Exercise Period, a number of Options equal to 25% of the number of Convertible Notes in denominations of USD1,000 principal amount surrendered to Counterparty for conversion with respect to such Exercise Period but no greater than the Number of Options.
Expiration Time:		The Valuation Time
Expiration Date:		May 1, 2014, subject to earlier exercise.
Multiple Exercise:		Applicable, as described under Exercisable Options above.
Automatic Exercise:		Applicable; and means that in respect of an Exercise Period, a number of Options not previously exercised hereunder equal to the number of Exercisable Options shall be deemed to be exercised on the final day of such Exercise Period for such Exercisable Options; provided that such Options shall be deemed exercised only to the extent that Counterparty has provided a Notice of Exercise to Dealer.
Notice of Exercise:		Notwithstanding anything to the contrary in the Equity Definitions, in order to exercise any Exercisable Options, Counterparty must notify Dealer in writing before 5:00 p.m. (New York City time) on the Scheduled Valid Day prior to the scheduled first day of the Settlement Averaging Period for the Exercisable Options being exercised, of (i) the number of such Options, (ii) the scheduled first day of the Settlement Averaging Period and (iii) the scheduled Settlement Date; provided that in respect of Exercisable Options relating to Convertible Notes with a Conversion Date on or following February 19, 2014, notice may be given on or prior to the second Scheduled Valid Day immediately preceding the Expiration Date and need only specify the number of such Exercisable Options.

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Valuation Time:		At the close of trading of the regular trading session on the Exchange; provided that if the principal trading session is extended, the Calculation Agent shall determine the Valuation Time in its reasonable discretion.
Market Disruption Event:		Section 6.3(a) of the Equity Definitions is hereby replaced in its entirety by the following: “‘Market Disruption Event’ means in respect of a Share, (i) a failure by the primary United States national or regional securities exchange or market on which Shares are listed or admitted to trading to open for trading during its regular trading session or (ii) the occurrence or existence for more than one half-hour period in the aggregate on any Scheduled Valid Day for the Shares of any suspension or limitation imposed on trading (by reason of movements in price exceeding limits permitted by the relevant stock exchange or otherwise) in the Shares on the relevant exchange or in any options, contracts or future contracts relating to the Shares on the relevant stock exchange, and such suspension or limitation occurs or exists at any time before 1:00 p.m. (New York City time) on such day.”

Settlement Terms:

Settlement Method:		Net Share Settlement
Net Share Settlement:		Dealer will deliver to Counterparty, on the relevant Settlement Date, a number of Shares equal to the Net Shares in respect of any Exercisable Option exercised or deemed exercised hereunder. In no event will the Net Shares be less than zero.
Net Shares:		In respect of any Exercisable Option exercised or deemed exercised, a number of Shares equal to (i) the Option Entitlement multiplied by (ii) the sum of the quotients, for each Valid Day during the Settlement Averaging Period for such Exercisable Option, of (A) the Relevant Price on such Valid Day less the Strike Price, divided by (B) such Relevant Price, divided by (iii) the number of Valid Days in the Settlement Averaging Period; provided, however, that if the calculation contained in clause (A) above results in a negative number, such number shall be replaced with the number “zero”. Dealer will deliver cash in lieu of any fractional Shares to be delivered with respect to any Net Shares valued at the Relevant Price for the last Valid Day of the Settlement Averaging Period.
Valid Day:		A day on which (i) there is no Market Disruption Event and (ii) trading in the Shares generally occurs on the Exchange or, if the Shares are not then listed on the Exchange, on the principal other U.S. national or

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		regional securities exchange on which the Shares are then listed or, if the Shares are not then listed on a U.S. national or regional securities exchange, on the principal other market on which the Shares are then traded. If the Shares (or other security for which a Relevant Price must be determined) are not so listed or quoted, a Valid Day means a Business Day.
Scheduled Valid Day:		A day that is scheduled to be a Valid Day on the primary U.S. national or regional securities exchange or market on which the Shares are listed or admitted for trading. If the Shares are not listed or admitted for trading, Scheduled Valid Day means a Business Day.
Relevant Price:		On any Valid Day, the per Share volume-weighted average price as displayed under the heading “Bloomberg VWAP” on Bloomberg page CAI.N <equity> AQR (or its equivalent successor if such page is not available) in respect of the period from the scheduled opening time of the Exchange to the Scheduled Closing Time of the Exchange on such Valid Day (or if such volume-weighted average price is unavailable, the market value of one Share on such Valid Day, as determined by the Calculation Agent using a volume-weighted method). Relevant Price will be determined without regard to after hours trading or any other trading outside of the regular trading session hours.
Settlement Averaging Period:		For any Exercisable Options relating to the conversion of Convertible Notes, (x) if Counterparty has delivered a Notice of Exercise to Dealer with respect to an Exercisable Option with a Conversion Date prior to February 19, 2014, the forty five (45) consecutive Valid Days commencing on and including the third Scheduled Valid Day following such Conversion Date; or (y) if Counterparty has delivered a Notice of Exercise to Dealer with respect to such Exercisable Options with respect to a Conversion Date occurring on or after February 19, 2014, the forty five (45) consecutive Valid Days commencing on and including the forty seventh (47th) Scheduled Valid Day immediately prior to the Expiration Date.
Settlement Date:		For any Exercisable Option, the date Shares are required to be delivered with respect to the Convertible Notes related to such Exercisable Options, under the terms of the Indenture.
Settlement Currency:		USD
Other Applicable Provisions:		The provisions of Sections 9.1(c), 9.8, 9.9, 9.11, 9.12 and 10.5 of the Equity Definitions will be applicable, except that all references in such provisions to “Physically-settled” shall be read as references to “Net Share Settled.” “Net Share Settled” in relation to any Option means that Net Share Settlement is applicable to that Option.

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Representation and Agreement: Notwithstanding Section 9.11 of the Equity Definitions, the parties acknowledge that any Shares delivered to Counterparty shall be, upon delivery, subject to restrictions and limitations arising from Counterparty’s status as issuer of the Shares under applicable securities laws.

3. Additional Terms applicable to the Transaction:

Adjustments applicable to the Transaction:

Potential Adjustment Events:		Notwithstanding Section 11.2(e) of the Equity Definitions, a “Potential Adjustment Event” means an occurrence of any event or condition, as set forth in Section 6.04 of the Indenture that would result in an adjustment to the Conversion Rate of the Convertible Notes; provided that in no event shall there be any adjustment hereunder as a result of an adjustment to the Conversion Rate pursuant to Section 6.04(h) of the Indenture.
Method of Adjustment:		Calculation Agent Adjustment, and means that, notwithstanding Section 11.2(c) of the Equity Definitions, upon any adjustment to the Conversion Rate of the Convertible Notes pursuant to the Indenture (other than Section 6.04(h) of the Indenture), the Calculation Agent will make a corresponding adjustment to any one or more of the Strike Price, Number of Options, the Option Entitlement and any other variable relevant to the exercise, settlement or payment for the Transaction.

Extraordinary Events applicable to the Transaction:

Merger Events:		Notwithstanding Section 12.1(b) of the Equity Definitions, a “Merger Event” means the occurrence of any event or condition set forth in Section 6.07 of the Indenture.
Tender Offers:		Applicable; provided that notwithstanding Section 12.1(d) of the Equity Definitions, a “Tender Offer” means the occurrence of any event or condition set forth in clause (1) of the definition of “Fundamental Change” in Section 1.01 of the Indenture.
Consequence of Merger Events/ Tender Offers:		Notwithstanding Section 12.2 and Section 12.3 of the Equity Definitions, upon the occurrence of a Merger Event or a Tender Offer, the Calculation Agent shall make a corresponding adjustment in respect of any adjustment under the Indenture to any one or more of the nature of the Shares, Strike Price, Number of Options, the Option Entitlement and any other variable relevant to the exercise, settlement or payment for the Transaction; provided that if, with respect to a Merger Event or a Tender Offer, the consideration for the Shares includes (or, at the option of a holder of Shares, may include) shares of an entity or person not organized under the

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		laws of the United States, any State thereof or the District of Columbia, Cancellation and Payment shall apply; provided, further, that the Calculation Agent may, in a commercially reasonable manner, limit or alter any such adjustment referenced in this paragraph so that the fair value of the Transaction to Dealer is not reduced as a result of such adjustment.
Nationalization, Insolvency or Delisting:		Cancellation and Payment (Calculation Agent Determination); provided that, in addition to the provisions of Section 12.6(a)(iii) of the Equity Definitions, it will also constitute a Delisting if the Exchange is located in the United States and the Shares are not immediately re-listed, re-traded or re-quoted on any of the New York Stock Exchange, the American Stock Exchange, The NASDAQ Global Select Market or The NASDAQ Global Market (or their respective successors); if the Shares are immediately re-listed, re-traded or re-quoted on any of the New York Stock Exchange, the American Stock Exchange, The NASDAQ Global Select Market or The NASDAQ Global Market (or their respective successors), such exchange or quotation system shall thereafter be deemed to be the Exchange.
Additional Disruption Events:
Change in Law:		Applicable
Failure to Deliver:		Applicable
Hedging Party:		For all applicable Additional Disruption Events, Dealer
Determining Party:		For all applicable Additional Disruption Events, Dealer

Non-Reliance:		Applicable
Agreements and Acknowledgements Regarding Hedging Activities:		Applicable
Additional Acknowledgments:		Applicable
4. Calculation Agent:		Dealer

5. Account Details:

(a) Account for payments to Counterparty:

To be provided by Counterparty

Account for delivery of Shares to Counterparty:

To be provided by Counterparty

(b) Account for payments to Dealer:

JPMorgan Chase Bank, National Association, New York

ABA: 021 000 021

Favour: JPMorgan Chase Bank, National Association – London

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A/C: 0010962009 XXXXXX00

Account for delivery of Shares from Dealer:

DTC 0060

6. Offices:

The Office of Counterparty for the Transaction is: Inapplicable, Counterparty is not a Multibranch Party.

The Office of Dealer for the Transaction is: London

JPMorgan Chase Bank, National Association

London Branch

P.O. Box 161

60 Victoria Embankment

London EC4Y 0JP

England

7. Notices: For purposes of this Confirmation:

(a) Address for notices or communications to Counterparty:

CACI International Inc

0000 Xxxxx Xxxxx Xxxx

Xxxxxxxxx, XX 00000

Attention: Xxxxxx Xxxxxx

Title: EVP & CFO

Telephone No.: (000) 000-0000

Facsimile No.: (000) 000-0000

(b) Address for notices or communications to Dealer:

JPMorgan Chase Bank, National Association

000 Xxxx Xxxxxx, 00^xx Xxxxx

Xxx Xxxx, XX 00000

Attention: Xxxx Xxxxxxxx

Title: Operations Analyst

EDG Corporate Marketing

Telephone No: (000) 000-0000

Facsimile No: (000) 000-0000

8. Representations and Warranties of Counterparty

The representations and warranties of Counterparty set forth in Section 3 of the Purchase Agreement (the “Purchase Agreement”) dated as of May 10, 2007 between Counterparty and X.X. Xxxxxx Securities Inc. and Banc of America Securities LLC as representatives of the Initial Purchasers party thereto are true and correct and are hereby deemed to be repeated to Dealer as if set forth herein. Counterparty hereby further represents and warrants to Dealer that:

(a) Counterparty has all necessary corporate power and authority to execute, deliver and perform its obligations in respect of this Transaction; such execution, delivery and performance have been duly authorized by all necessary corporate action on Counterparty’s part; and this Confirmation has been duly and validly executed and delivered by Counterparty and constitutes its valid and binding obligation, enforceable against Counterparty in accordance with its terms, subject to applicable bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and similar laws

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affecting creditors’ rights and remedies generally, and subject, as to enforceability, to general principles of equity, including principles of commercial reasonableness, good faith and fair dealing (regardless of whether enforcement is sought in a proceeding at law or in equity) and except that rights to indemnification and contribution hereunder may be limited by federal or state securities laws or public policy relating thereto.

(b) Neither the execution and delivery by Counterparty of this Confirmation nor the incurrence or performance of obligations of Counterparty hereunder will result in a breach or violation of the certificate of incorporation or by laws of Counterparty, or any applicable law or regulation, or any order, writ, injunction or decree of any court or governmental authority or agency, or result in the creation of any lien (other than any lien existing or arising under the Credit and Security Documents (as defined below)) under, or (except as may result from any Credit Agreement Matters (as defined below) with respect to the performance of obligations of Company hereunder) breach or constitute a default under any agreements and contracts of Counterparty and its significant subsidiaries filed as exhibits to Counterparty’s Annual Report on Form 10-K for the year ended June 30, 2006, and to Counterparty’s Quarterly Reports on Form 10-Q for the quarters ended September 30, 2006, December 31, 2006 and March 31, 2007, as updated by any exhibits to any Current Report on Form 8-K filed after March 31, 2007 and in each case incorporated by reference in the Offering Memorandum. As used herein, “Credit and Security Documents” means the Credit Agreement dated as of May 3, 2004, as amended by the First Amendment dated as of May 18, 2005 and by the Second Amendment dated as of (or about) May 9, 2007 (as so amended, the “Credit Agreement”), by and among Counterparty, the Guarantors identified therein, the Lenders identified therein and Bank of America, N.A., as Administrative Agent, and the Security Agreement (as defined therein) entered into in connection therewith. As used herein, “Credit Agreement Matters” means (i) the restrictions set forth in Section 8.06(d) of the Credit Agreement on Counterparty’s ability to make Restricted Payments (as defined in the Credit Agreement) as provided in such section, (ii) the restrictions set forth in Section 8.06(g) of the Credit Agreement on Counterparty’s ability to make cash payments pursuant to this Confirmation upon or following the conversion of any of the Convertible Notes (or any portion of Counterparty’s obligations thereunder) as provided in such section, and (iii) any potential cross default that might arise under Section 9.01(e)(iii) of the Credit Agreement based on the occurrence of an early termination date hereunder as provided in such section.

(c) No consent, approval, authorization, or order of, or filing with, any United States governmental agency or body or any court is required in connection with the execution, delivery or performance by Counterparty of this Confirmation, except such as have been obtained or made and such as may be required under the Securities Act of 1933, as amended (the “Securities Act”), the Securities Exchange Act of 1934, as amended (the “Exchange Act”) or state securities laws.

(d) It is an “eligible contract participant” (as such term is defined in Section 1a(12) of the Commodity Exchange Act, as amended (the “CEA”)) because one or more of the following is true:

Counterparty is a corporation, partnership, proprietorship, organization, trust or other entity and:

(A) Counterparty has total assets in excess of USD 10,000,000;

(B) the obligations of Counterparty hereunder are guaranteed, or otherwise supported by a letter of credit or keepwell, support or other agreement, by an entity of the type described in Section 1a(12)(A)(i) through (iv), 1a(12)(A)(v)(I), 1a(12)(A)(vii) or 1a(12)(C) of the CEA; or

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(C) Counterparty has a net worth in excess of USD 1,000,000 and has entered into this Agreement in connection with the conduct of Counterparty’s business or to manage the risk associated with an asset or liability owned or incurred or reasonably likely to be owned or incurred by Counterparty in the conduct of Counterparty’s business.

(e) Each of it and its affiliates is not, on the date hereof, in possession of any material non-public information with respect to Counterparty.

9. Other Provisions:

(a) Opinions. Counterparty shall deliver to Dealer an opinion or opinions of counsel, dated as of the Trade Date, with respect to the matters set forth in Sections 8(a) through (c) of this Confirmation, subject to the limitations and exceptions set forth in the Purchase Agreement.

(b) Amendment. If the Initial Purchasers party to the Purchase Agreement exercise their right to purchase additional Convertible Notes as set forth therein, then, at the discretion of Counterparty, Dealer and Counterparty will either enter into a new confirmation or amend this Confirmation to provide for such increase in Convertible Notes (but on pricing terms acceptable to Dealer and Counterparty) (such additional confirmation or amendment to this Confirmation to provide for the payment by Counterparty to Dealer of the additional premium related thereto).

(c) Repurchase Notices. Counterparty shall, on any day on which Counterparty effects any repurchase of Shares, promptly give Dealer a written notice of such repurchase (a “Repurchase Notice”) on such day if following such repurchase, the quotient of (x) the product of (a) the Number of Options and (b) the Option Entitlement divided by (y) the number of Counterparty’s outstanding Shares (such quotient expressed as a percentage, (such quotient expressed as a percentage, the “Option Equity Percentage”) would be (i) greater than 6.0% or (ii) 0.5% greater than the Option Equity Percentage included in the immediately preceding Repurchase Notice. Counterparty agrees to indemnify and hold harmless Dealer and its affiliates and their respective officers, directors, employees, affiliates, advisors, agents and controlling persons (each, an “Indemnified Person”) from and against any and all losses (including losses relating to Dealer’s hedging activities as a consequence of becoming, or of the risk of becoming, a Section 16 “insider”, including without limitation, any forbearance from hedging activities or cessation of hedging activities and any losses in connection therewith with respect to this Transaction), claims, damages, judgments, liabilities and expenses (including reasonable attorney’s fees), joint or several, which an Indemnified Person may become subject to, as a result of Counterparty’s failure to provide Dealer with a Repurchase Notice on the day and in the manner specified in this paragraph, and to reimburse, within 30 days, upon documented written request, each of such Indemnified Persons for any reasonable legal or other expenses incurred in connection with investigating, preparing for, providing testimony or other evidence in connection with or defending any of the foregoing. If any suit, action, proceeding (including any governmental or regulatory investigation), claim or demand shall be brought or asserted against the Indemnified Person as a result of Counterparty’s failure to provide Dealer with a Repurchase Notice in accordance with this paragraph, such Indemnified Person shall promptly notify Counterparty in writing, and Counterparty, upon request of the Indemnified Person, shall retain counsel reasonably satisfactory to the Indemnified Person to represent the Indemnified Person and any others Counterparty may designate in such proceeding and shall pay the reasonable fees and expenses of such counsel related to such proceeding. Counterparty shall not be liable for any settlement of any proceeding contemplated by this paragraph that is effected without its written consent, but if settled with such consent or if there be a final judgment for the plaintiff, Counterparty agrees to indemnify any Indemnified Person from and against any loss or liability by reason of such settlement or judgment. Counterparty shall not, without

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the prior written consent of the Indemnified Person, effect any settlement of any pending or threatened proceeding contemplated by this paragraph that is in respect of which any Indemnified Person is or could have been a party and indemnity could have been sought hereunder by such Indemnified Person, unless such settlement includes an unconditional release of such Indemnified Person from all liability on claims that are the subject matter of such proceeding. If the indemnification provided for in this paragraph is unavailable to an Indemnified Person or insufficient in respect of any losses, claims, damages or liabilities referred to therein, then Counterparty hereunder, in lieu of indemnifying such Indemnified Person thereunder, shall contribute to the amount paid or payable by such Indemnified Person as a result of such losses, claims, damages or liabilities. The remedies provided for in this paragraph (c) are not exclusive and shall not limit any rights or remedies which may otherwise be available to any Indemnified Party at law or in equity. The indemnity and contribution agreements contained in this paragraph shall remain operative and in full force and effect regardless of the termination of this Transaction.

(d) Regulation M. Counterparty is not on the date hereof engaged in a distribution, as such term is used in Regulation M under the Exchange Act, of any securities of Counterparty, other than (i) a distribution meeting the requirements of the exception set forth in Rules 101(b)(10) and 102(b)(7) of Regulation M and (ii) the distribution of the Convertible Notes. Counterparty shall not, until the second Scheduled Trading Day immediately following the Trade Date, engage in any such distribution, subject to the foregoing exceptions.

(e) No Manipulation. Counterparty is not entering into this Transaction to create actual or apparent trading activity in the Shares (or any security convertible into or exchangeable for the Shares) or to raise or depress or otherwise manipulate the price of the Shares (or any security convertible into or exchangeable for the Shares) or otherwise in violation of the Exchange Act.

(f) Board Authorization. Each of this Transaction and the issuance of the Convertible Notes was approved by Counterparty’s board of directors and publicly announced, solely for the purposes stated in such public disclosure and, prior to any exercise of Options hereunder, Counterparty’s board of directors will have duly authorized any repurchase of Shares pursuant to this Transaction. Counterparty further represents that there is no internal policy, whether written or oral, of Counterparty that would prohibit Counterparty from entering into any aspect of this Transaction, including, but not limited to, the purchases of Shares to be made pursuant hereto.

(g) Early Unwind. In the event the sale of Convertible Notes is not consummated with the initial purchasers for any reason by the close of business in New York on May 16, 2007 (or such later date as agreed upon by the parties) (May 16, 2007 or such later date as agreed upon being the “Early Unwind Date”), this Transaction shall automatically terminate (the “Early Unwind”), on the Early Unwind Date and (i) the Transaction and all of the respective rights and obligations of Dealer and Counterparty under the Transaction shall be cancelled and terminated and (ii) each party shall be released and discharged by the other party from and agrees not to make any claim against the other party with respect to any obligations or liabilities of the other party arising out of and to be performed in connection with the Transaction either prior to or after the Early Unwind Date; provided that Counterparty shall purchase from Dealer on the Early Unwind Date all Shares purchased by Dealer or one of more of its affiliates and reimburse Dealer for any costs or expenses (including market losses) relating to the unwinding of its hedging activities in connection with the Transaction (including any loss or cost incurred as a result of its terminating, liquidating, obtaining or reestablishing any hedge or related trading position). The amount of any such reimbursement shall be determined by Dealer in its sole good faith discretion. Dealer shall notify Counterparty of such amount and Counterparty shall pay such amount in immediately available funds on the Early Unwind

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Date. Dealer and Counterparty represent and acknowledge to the other that, subject to the proviso included in this paragraph, upon an Early Unwind, all obligations with respect to the Transaction shall be deemed fully and finally discharged.

(h) Transfer or Assignment. Counterparty may not transfer any of its rights or obligations under this Transaction without the prior written consent of Dealer. If (i) Dealer’s “beneficial ownership” (within the meaning of Section 13 of the Exchange Act and rules promulgated thereunder) exceeds 7.5% of Counterparty’s outstanding Shares or (ii) the Option Equity Percentage exceeds 14.5%, Dealer may, without Counterparty’s consent, transfer or assign all or any part of its rights or obligations under the Transaction to any third party with a rating for its long term, unsecured and unsubordinated indebtedness equal to or better than the lesser of (i) the credit rating of Dealer at the time of the transfer and (ii) A- by Standard and Poor’s Rating Group, Inc. or its successor (“S&P”), or A3 by Xxxxx’x Investor Service, Inc. (“Moody’s”) or, if either S&P or Moody’s ceases to rate such debt, at least an equivalent rating or better by a substitute agency rating mutually agreed by Counterparty and Dealer. If after Dealer’s commercially reasonable efforts, Dealer is unable to effect such a transfer or assignment on pricing terms reasonably acceptable to Dealer and within a time period reasonably acceptable to Dealer of a sufficient number of Options to reduce (i) Dealer’s “beneficial ownership” (within the meaning of Section 13 of the Exchange Act and rules promulgated thereunder) to 7.5% of Counterparty’s outstanding Shares or less or (ii) the Option Equity Percentage to 14.5% or less, Dealer may designate any Exchange Business Day as an Early Termination Date with respect to a portion (the “Terminated Portion”) of this Transaction, such that (i) its “beneficial ownership” following such partial termination will be equal to or less than 7.5% or (ii) the Option Equity Percentage following such partial termination will be equal to or less than 14.5%. In the event that Dealer so designates an Early Termination Date with respect to a portion of this Transaction, a payment shall be made pursuant to Section 6 of the Agreement as if (i) an Early Termination Date had been designated in respect of a Transaction having terms identical to this Transaction and a Number of Options equal to the Terminated Portion, (ii) Counterparty shall be the sole Affected Party with respect to such partial termination and (iii) such Transaction shall be the only Terminated Transaction (and, for the avoidance of doubt, the provisions of Section 9(n) shall apply to any amount that is payable by Dealer to Counterparty pursuant to this sentence as if Counterparty was not the Affected Party). Notwithstanding any other provision in this Confirmation to the contrary requiring or allowing Dealer to purchase, sell, receive or deliver any shares or other securities to or from Counterparty, Dealer may designate any of its affiliates to purchase, sell, receive or deliver such shares or other securities and otherwise to perform Dealer’s obligations in respect of this Transaction and any such designee may assume such obligations. Dealer shall be discharged of its obligations to Counterparty to the extent of any such performance. Any transfer, assignment or early termination of this Transaction by Dealer shall be in full compliance with the Securities Act and other applicable laws.

(i) Staggered Settlement. If upon advice of counsel with respect to applicable legal and regulatory requirements, including any requirements relating to Dealer’s hedging activities hereunder, Dealer reasonably determines that it would not be practicable or advisable to deliver, or to acquire Shares to deliver, any or all of the Shares to be delivered by Dealer on the Settlement Date for the Transaction, Dealer may, by notice to Counterparty on or prior to any Settlement Date (a “Nominal Settlement Date”), elect to deliver the Shares on two or more dates (each, a “Staggered Settlement Date”) as follows:

(a) in such notice, Dealer will specify to Counterparty the related Staggered Settlement Dates (the first of which will be such Nominal Settlement Date and the last of which will be no later than the twentieth (20th) Exchange Business Day following such Nominal Settlement Date) and the number of Shares that it will deliver on each Staggered Settlement Date;

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(b) the aggregate number of Shares that Dealer will deliver to Counterparty hereunder on all such Staggered Settlement Dates will equal the number of Shares that Dealer would otherwise be required to deliver on such Nominal Settlement Date; and

(c) if the Net Share Settlement terms set forth above were to apply on the Nominal Settlement Date, then the Net Share Settlement terms will apply on each Staggered Settlement Date, except that the Net Shares will be allocated among such Staggered Settlement Dates as specified by Dealer in the notice referred to in clause (a) above.

(j) Role of Agent. Each party agrees and acknowledges that (i) X.X. Xxxxxx Securities Inc., an affiliate of JPMorgan (“JPMSI”), has acted solely as agent and not as principal with respect to this Transaction and (ii) JPMSI has no obligation or liability, by way of guaranty, endorsement or otherwise, in any manner in respect of this Transaction (including, if applicable, in respect of the settlement thereof). Each party agrees it will look solely to the other party (or any guarantor in respect thereof) for performance of such other party’s obligations under this Transaction.

(k) Additional Termination Events. Notwithstanding anything to the contrary in this Confirmation, if an event of default with respect to Counterparty shall occur under the terms of the Convertible Notes as set forth in Section 7.01 of the Indenture, which has resulted in such Convertible Notes becoming due and payable, then such event of default shall constitute an Additional Termination Event applicable to the Transaction and, with respect to such event of default (A) Counterparty shall be deemed to be the sole Affected Party and the Transaction shall be the sole Affected Transaction and (B) Dealer shall be the party entitled to designate an Early Termination Date pursuant to Section 6(b) of the Agreement.

(l) Amendments to Equity Definitions. Section 12.6(a)(ii) of the Equity Definitions is hereby amended by (1) deleting from the fourth line thereof the word “or” after the word “official” and inserting a comma therefor, and (2) deleting the semi-colon at the end of subsection (B) thereof and inserting the following words therefor “or (C) at Dealer’s option, the occurrence of any of the events specified in Section 5(a)(vii) (1) through (9) of the ISDA Master Agreement with respect to that Issuer.”

(m) Setoff. Notwithstanding any provision of the Agreement or any other agreement between the parties to the contrary, the obligations of Counterparty hereunder are not secured by any collateral. Obligations under this Transaction shall not be set off by Counterparty against any other obligations of the parties, whether arising under the Agreement, this Confirmation, under any other agreement between the parties hereto, by operation of law or otherwise. In addition to and without limiting any rights of set-off that a party hereto may have as a matter of law, pursuant to contract or otherwise, upon the occurrence of an Early Termination Date, Dealer (and only Dealer) shall have the right to set off any obligation that it may have to Counterparty under this Confirmation, including without limitation any obligation to make any payment of cash or delivery of Shares to Counterparty, against any obligation Counterparty may have to Dealer under any other agreement between Dealer and Counterparty relating to common equity (each such contract or agreement, a “Separate Agreement”), including without limitation any obligation to make a payment of cash or a delivery of Shares or any other property or securities. For this purpose, Dealer shall be entitled to convert any obligation (or the relevant portion of such obligation) denominated in one currency into another currency at the rate of exchange at which it would be able to purchase the relevant amount of such currency, and to convert any obligation to deliver any non-cash property into an obligation to deliver cash in an amount calculated by reference to the market value of such property as of the Early Termination Date, as determined by the Calculation Agent in its sole discretion; provided that in the case of a set-off of any obligation to release or

13

deliver assets against any right to receive fungible assets, such obligation and right shall be set off in kind and; provided further that in determining the value of any obligation to deliver Shares, the value at any time of such obligation shall be determined by reference to the market value of the Shares at such time, as determined in good faith by the Calculation Agent. If an obligation is unascertained at the time of any such set-off, the Calculation Agent may in good faith estimate the amount or value of such obligation, in which case set-off will be effected in respect of that estimate, and the relevant party shall account to the other party at the time such obligation or right is ascertained.

(n) Alternative Calculations and Payment on Early Termination and on Certain Extraordinary Events. If in respect of this Transaction, an amount is payable by Dealer to Counterparty (i) pursuant to Section 12.7 or Section 12.9 of the Equity Definitions or (ii) pursuant to Section 6(d)(ii) of the Agreement (a “Payment Obligation”), Counterparty may request Dealer to satisfy any such Payment Obligation by the Share Termination Alternative (as defined below) (except that Counterparty shall not make such an election in the event of a Nationalization, Insolvency, a Merger Event or Tender Offer, in each case, in which the consideration to be paid to holders of Shares consists solely of cash, or an Event of Default in which Counterparty is the Defaulting Party or a Termination Event in which Counterparty is the Affected Party, other than an Event of Default of the type described in Section 5(a)(iii), (v), (vi), (vii) or (viii) of the Agreement or a Termination Event of the type described in Section 5(b) of the Agreement in each case that resulted from an event or events outside Counterparty’s control) and shall give irrevocable telephonic notice to Dealer, confirmed in writing within one Currency Business Day, no later than 12:00 p.m. New York local time on the Merger Date, the Announcement Date (in the case of Nationalization, Insolvency or Delisting), the Early Termination Date or date of cancellation, as applicable; provided that if Counterparty does not validly request Dealer to satisfy its Payment Obligation by the Share Termination Alternative, Dealer shall have the right, in its sole discretion, to satisfy its Payment Obligation by the Share Termination Alternative, notwithstanding Counterparty’s election to the contrary. In calculating any amounts under Section 6(e) of the Agreement, notwithstanding anything to the contrary in the Agreement, (1) separate amounts shall be calculated as set forth in Section 6(e) with respect to (i) this Transaction and (ii) all other Transactions, and (2) such separate amounts shall be payable pursuant to Section 6(d)(ii) of the Agreement. For avoidance of doubt, the parties agree that in calculating the Payment Obligation the Determining Party may consider the purchase price paid in connection with the purchase of Share Termination Delivery Property.

Share Termination Alternative:		Applicable and means that Dealer shall deliver to Counterparty the Share Termination Delivery Property on, or within a commercially reasonable period of time after, the date when the Payment Obligation would otherwise be due pursuant to Section 12.7 or 12.9 of the Equity Definitions or Section 6(d)(ii) and 6(e) of the Agreement, as applicable (the “Share Termination Payment Date”), in satisfaction of the Payment Obligation in the manner reasonably requested by Counterparty free of payment.
Share Termination Delivery Property:		A number of Share Termination Delivery Units, as calculated by the Calculation Agent, equal to the Payment Obligation divided by the Share Termination Unit Price. The Calculation Agent shall adjust the Share Termination Delivery Property by

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		replacing any fractional portion of a security therein with an amount of cash equal to the value of such fractional security based on the values used to calculate the Share Termination Unit Price.
Share Termination Unit Price:		The value to Dealer of property contained in one Share Termination Delivery Unit, as determined by the Calculation Agent in its discretion by commercially reasonable means and notified by the Calculation Agent to Dealer at the time of notification of the Payment Obligation.
Share Termination Delivery Unit:		One Share or, if a Merger Event has occurred and a corresponding adjustment to this Transaction has been made, a unit consisting of the number or amount of each type of property received by a holder of one Share (without consideration of any requirement to pay cash or other consideration in lieu of fractional amounts of any securities) in such Merger Event, as determined by the Calculation Agent.
Failure to Deliver:		Applicable
Other applicable provisions:		If Share Termination Alternative is applicable, the provisions of Sections 9.8, 9.9, 9.11, 9.12 and 10.5 (as modified above) of the Equity Definitions will be applicable, except that all references in such provisions to “Physically-settled” shall be read as references to “Share Termination Settled” and all references to “Shares” shall be read as references to “Share Termination Delivery Units”. “Share Termination Settled” in relation to this Transaction means that Share Termination Alternative is applicable to this Transaction.

(o) Governing Law. New York law (without reference to choice of law doctrine).

(p) Waiver of Jury Trial. Each party waives, to the fullest extent permitted by applicable law, any right it may have to a trial by jury in respect of any suit, action or proceeding relating to this Transaction. Each party (i) certifies that no representative, agent or attorney of either party has represented, expressly or otherwise, that such other party would not, in the event of such a suit, action or proceeding, seek to enforce the foregoing waiver and (ii) acknowledges that it and the other party have been induced to enter into this Transaction, as applicable, by, among other things, the mutual waivers and certifications provided herein.

(q) Registration. Counterparty hereby agrees that if, in the good faith reasonable judgment of Dealer, based on advice of counsel, the Shares (“Hedge Shares”) acquired by Dealer for the purpose of hedging its obligations pursuant to this Transaction cannot be sold in the public market by Dealer without registration under the Securities Act, Counterparty shall, at its election, either (i) in order to allow Dealer to sell the Hedge Shares in a

15

registered offering, make available to Dealer an effective registration statement under the Securities Act and enter into an agreement, in form and substance satisfactory to Dealer and Counterparty, substantially in the form of an underwriting agreement for a registered secondary offering; provided, however, that if Dealer, in its sole reasonable discretion, is not satisfied with access to due diligence materials, the results of its due diligence investigation, or the procedures and documentation for the registered offering referred to above, then clause (ii) or clause (iii) of this paragraph shall apply at the election of Counterparty, (ii) in order to allow Dealer to sell the Hedge Shares in a private placement, enter into a private placement agreement substantially similar to private placement purchase agreements customary for private placements of equity securities, in form and substance satisfactory to Dealer and Counterparty (in which case, the Calculation Agent shall make any adjustments to the terms of this Transaction that are necessary, in its reasonable judgment, to compensate Dealer for any discount from the public market price of the Shares incurred on the sale of Hedge Shares in a private placement), or (iii) purchase the Hedge Shares from Dealer at the Reference Price on such Exchange Business Days, and in the amounts, requested by Dealer.

(r) Tax Disclosure. Effective from the date of commencement of discussions concerning the Transaction, Counterparty and each of its employees, representatives, or other agents may disclose to any and all persons, without limitation of any kind, the tax treatment and tax structure of the Transaction and all materials of any kind (including opinions or other tax analyses) that are provided to Counterparty relating to such tax treatment and tax structure.

(s) Right to Extend. Dealer may delay any Settlement Date or any other date of delivery by Dealer, with respect to some or all of the Options hereunder, if Dealer reasonably determines, in its discretion, that such extension is reasonably necessary or advisable to enable Dealer to effect purchases or borrowings of Shares in connection with its hedging activity or settlement activity hereunder in compliance with applicable legal, regulatory or self-regulatory requirements, or with related policies and procedures applicable to Dealer.

(t) Status of Claims in Bankruptcy. Dealer acknowledges and agrees that this Confirmation is not intended to convey to Dealer rights against Counterparty with respect to the Transaction that are senior to the claims of common stockholders of Counterparty in any U.S. bankruptcy proceedings of Counterparty; provided that nothing herein shall limit or shall be deemed to limit Dealer’s right to pursue remedies in the event of a breach by Counterparty of its obligations and agreements with respect to the Transaction; provided, further, that nothing herein shall limit or shall be deemed to limit Dealer’s rights in respect of any transactions other than the Transaction.

(u) Securities Contract; Swap Agreement. The parties hereto intend for: (a) the Transaction to be a “securities contract” and a “swap agreement” as defined in the Bankruptcy Code (Title 11 of the United States Code) (the “Bankruptcy Code”), and the parties hereto to be entitled to the protections afforded by, among other Sections, Sections 362(b)(6), 362(b)(17), 546(e), 546(g), 555 and 560 of the Bankruptcy Code; (b) a party’s right to liquidate the Transaction and to exercise any other remedies upon the occurrence of any Event of Default under the Agreement with respect to the other party to constitute a “contractual right” as described in the Bankruptcy Code; and (c) each payment and delivery of cash, securities or other property hereunder to constitute a “margin payment” or “settlement payment” and a “transfer” as defined in the Bankruptcy Code.

(v) Additional Provisions. Counterparty covenants and agrees that, as promptly as practicable following the public announcement of any consolidation, merger and binding share exchange to which Counterparty is a party, or any sale of all or substantially all of Counterparty’s assets, in each case pursuant to which the Shares will be converted into cash, securities or other property, Counterparty shall notify Dealer in writing of the types

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and amounts of consideration that holders of Shares have elected to receive upon consummation of such transaction or event (the date of such notification, the “Consideration Notification Date”); provided that in no event shall the Consideration Notification Date be later than the date on which such transaction or event is consummated.

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Please confirm that the foregoing correctly sets forth the terms of our agreement by executing this Confirmation and returning it to EDG Confirmation Group, X.X. Xxxxxx Securities Inc., 000 Xxxx Xxxxxx, 00xx Xxxxx, Xxx Xxxx, XX 00000-0000, or by fax to (000) 000 0000.

Very truly yours,
		X.X. Xxxxxx Securities Inc., as agent for JPMorgan Chase Bank, National Association
		By:		/s/ Xxxx Xxxxxxxxx
				Xxxx Xxxxxxxxx
				Managing Director

Accepted and confirmed

as of the Trade Date:

CACI International Inc

By:		/s/ Xxxxxx Xxxxxx
		Xxxxxx Xxxxxx
		Executive Vice President & CFO

XX Xxxxxx Chase Bank, National Association

Organised under the laws of the United States as a National Banking Association.

Main Xxxxxx 0000 Xxxxxxx Xxxxxxx, Xxxxxxxx, Xxxx 00000

Registered as a branch in England & Wales branch No. BR000746. Registered

Branch Office 000 Xxxxxx Xxxx, Xxxxxx XX0X0XX

Authorised and regulated by the Financial Services Authority

EXECUTION COPY

JPMorgan Chase Bank, National Association

X.X. Xxx 000

60 Victoria Embankment

Xxxxxx XX0X 0XX

England

May 11, 2007

To: CACI International Inc

0000 Xxxxx Xxxxx Xxxx

Xxxxxxxxx, XX 00000

Attention:		Xxxxxx Xxxxxx
		EVP & CFO
Telephone No.:		(000) 000-0000
Facsimile No.:		(000) 000-0000

Re: Call Option Transaction

This letter agreement (the “Amendment”) amends the terms and conditions of the Transaction (the “Transaction”) entered into between JPMorgan Chase Bank, National Association, London Branch (“Dealer”) and CACI International Inc (“Counterparty”), pursuant to a letter agreement dated May 10, 2007 (the “Confirmation”) pursuant to which Counterparty purchased from Dealer a Number of Options equal to 67,500 in connection with the issuance by Counterparty of USD 270,000,000 principal amount of 2.125% Convertible Senior Subordinated Notes due 2014 (the “Initial Convertible Notes”). This Amendment relates to, and sets forth the terms of, the purchase by Counterparty from Dealer of an additional Number of Options (the “Additional Number of Options”) in connection with the issuance (the “Additional Convertible Notes Issuance”) by Counterparty of an additional USD 30,000,000 principal amount of 2.125% Convertible Senior Subordinated Notes due 2014 (the “Additional Convertible Notes”, and together with the Initial Convertible Notes, the “Convertible Notes”) to the initial purchasers of the Convertible Notes.

Upon the effectiveness of this Amendment, all references in the Confirmation to (i) the “Number of Options” will be deemed to be to the Number of Options as amended hereby, (ii) the “Transaction” will be deemed to be to the Transaction, as amended hereby, and (iii) “Convertible Notes” will be deemed to include the Additional Convertible Notes. Except to the extent specified below, all other provisions of the Confirmation shall apply to the Additional Number of Options as if such Additional Number of Options were originally subject to the Confirmation. Capitalized terms used herein without definition shall have the meanings assigned to them in the Confirmation.

The terms relating to the purchase of the Additional Number of Options are as follows:

1. The “Trade Date” with respect to the Additional Number of Options will be May 11, 2007.

2. The “Number of Options” for the Transaction will be “75,000” reflecting an addition of 7,500 Additional Number of Options.

3. The “Premium” for the Transaction will be $21,090,000 reflecting an increase of the premium payable by Counterparty to Dealer in the amount of $2,109,000 for the Additional Number of Options.

XX Xxxxxx Xxxxx Bank, National Association

Organised under the laws of the United States as a National Banking Association.

Main Xxxxxx 0000 Xxxxxxx Xxxxxxx, Xxxxxxxx, Xxxx 00000

Registered as a branch in England & Wales branch No. BR000746. Registered

Branch Office 000 Xxxxxx Xxxx, Xxxxxx XX0X0XX

Authorised and regulated by the Financial Services Authority

4. Each of Dealer and Counterparty hereby repeats the representations, warranties and agreements made by such party in the Confirmation, with respect to the Amendment or with respect to the Confirmation, as amended by the Amendment, as the context requires.

5. Except as amended hereby, all the terms of the Transaction and provisions in the Confirmation shall remain and continue in full force and effect and are hereby confirmed in all respects.

6. This Amendment may be signed in any number of counterparts, each of which shall be an original, with the same effect as if all of the signatures thereto and hereto were upon the same instrument.

7. The provisions of this Amendment shall be governed by the New York law (without reference to choice of law doctrine).

Please confirm that the foregoing correctly sets forth the terms of our agreement by executing this Amendment and returning it to EDG Confirmation Group, X.X. Xxxxxx Securities Inc., 000 Xxxx Xxxxxx, 00xx Xxxxx, Xxx Xxxx, XX 00000-0000, or by fax to (000) 000 0000.

Very truly yours,
		X.X. Xxxxxx Securities Inc., as agent for JPMorgan Chase Bank, National Association
		By:		/s/ Xxxxxxx Xxxxx
				Xxxxxxx Xxxxx
				Managing Director

Accepted and confirmed

as of the Trade Date:

CACI International Inc
By:		/s/ Xxxxxx Xxxxxx
		Xxxxxx Xxxxxx
		Executive Vice President, CFO

XX Xxxxxx Chase Bank, National Association

Organised under the laws of the United States as a National Banking Association.

Main Xxxxxx 0000 Xxxxxxx Xxxxxxx, Xxxxxxxx, Xxxx 00000

Registered as a branch in England & Wales branch No. BR000746. Registered

Branch Office 000 Xxxxxx Xxxx, Xxxxxx XX0X0XX

Authorised and regulated by the Financial Services Authority