Exhibit 32.2

                           CERTIFICATION PURSUANT
                            TO SECTION 906 OF THE
                         SARBANES-OXLEY ACT OF 2002

                  In connection with the quarterly report of Engineered
Support Systems, Inc. (the "Company") on Form 10-Q for the period ended
April 30, 2004 (the "Report"), I, Gary C. Gerhardt, Vice Chairman and Chief
Financial Officer of the Company, certify, pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002 that:

         (1)      The Report complies with Sections 13(a) and 15(d) of the
                  Securities Exchange Act of 1934; and,

         (2)      The information contained in the Report fairly presents,
                  in all material respects, the financial condition and
                  results of operations of the Company.

Date: June 14, 2004
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By: /s/ Gary C. Gerhardt
   ------------------------
    Gary C. Gerhardt
    Vice Chairman and Chief
    Financial Officer

A signed original of this written statement required by Section 906 has been
provided to Engineered Support Systems, Inc. and will be retained by
Engineered Support Systems, Inc. and furnished to the Securities and
Exchange Commission or its staff upon request.