1 Exhibit 4.3 STOCK OPTION AGREEMENT THIS STOCK OPTION AGREEMENT ("Option Agreement") is made effective as of the 29th day of May, 1998, by and between ERIC J. BREHM ("Optionee") and DELTEK SYSTEMS, INC., a Virginia corporation (the "Company"). NOW,...Stock Option Agreement • August 18th, 1999 • Deltek Systems Inc • Services-computer programming services • Virginia
