1 EXHIBIT 1 JOINT FILING AGREEMENT In accordance with Rule 13d-1(f) promulgated under the Securities Exchange Act of 1934, the undersigned hereby agree to the joint filing of a Statement on Schedule 13D (including any and all amendments thereto) with...

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                                                                       EXHIBIT 1
 
                             JOINT FILING AGREEMENT
 
     In accordance with Rule 13d-1(f) promulgated under the Securities Exchange
Act of 1934, the undersigned hereby agree to the joint filing of a Statement on
Schedule 13D (including any and all amendments thereto) with respect to the
shares of Class A Common Stock, par value $0.001 per share, and the shares of
Class B Common Stock, par value $0.001 per share, of International Manufacturing
Services, Inc. and further agree that this Joint Filing Agreement (this
"Agreement") be included as an Exhibit thereto. In addition, each party to this
Agreement expressly authorizes each other party to this Agreement to file on its
behalf any and all amendments to such Statement.
 
Dated as of November 2, 1998
 
                                          ONEX CORPORATION
 
                                          By: /s/ XXXXXXX XXXX
                                             -----------------------------------
                                          Name:  Xxxxxxx Xxxx
                                          Title: Authorized Signatory

                                           /s/ XXXXXXX XXXX
                                          --------------------------------------
                                          Authorized Signatory for
                                          Xxxxxx X. Xxxxxxxx
 
                                          CELESTICA INC.
                                          By: /s/ XXXXX XXXXXXXXX
                                             -----------------------------------
                                          Name:  Xxxxx XxxXxxxxx
                                          Title: Vice President, General Counsel
                                                 and Secretary
 
                                          CELESTICA ASIA INC.
                                          By:    /s/ XXXXX XXXXXXXXX 
                                             -----------------------------------
                                          Name:  Xxxxx XxxXxxxxx
                                          Title: Vice President and General 
                                                 Counsel and Secretary