EXHIBIT 32.2

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

In connection with the Annual Report of Engineered Support Systems, Inc.
(the "Company") on Form 10-K for the year ended October 31, 2005 (the
"Report"), I, Gary C. Gerhardt, Vice Chairman and Chief Financial Officer of
ESSI, certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
that:

(1)  The Report fully 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
     ESSI.


Date:  January 9, 2006

/s/ Gary C. Gerhardt
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Gary C. Gerhardt
Vice Chairman and Chief Financial Officer