UNITED STATES
                     SECURITIES AND EXCHANGE COMMISSION
                            Washington, DC 20549

                                  FORM 8-K

                               CURRENT REPORT
   Pursuant to Section 13 or 15 (d) of The Securities Exchange Act of 1934



Date of Report (Date of earliest event reported) February 22, 2005
                                                 -----------------

                      ENGINEERED SUPPORT SYSTEMS, INC.
------------------------------------------------------------------------------
             (Exact Name of Registrant as Specified in Charter)


        MISSOURI                  0-13880                   43-1313242
(State of Incorporation)   (Commission File No.)          (IRS Employer
                                                        Identification No.)


201 Evans Lane, St. Louis, Missouri                           63121
(Address of principal executive officer)                    (Zip Code)


Registrant's telephone number including area code:  (314) 553-4000



Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of
the following provisions:

[ ]  Written communications pursuant to Rule 425 under the Securities Act
     (17 CFR 230.425)

[ ]  Soliciting material pursuant to Rule 14a-12 under the Exchange Act
     (17 CFR 240.14a-12)

[ ]  Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b))

[ ]  Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (17 CFR 240.13e-4(c))



Item  2.02        Results of Operations and Financial Condition

                  On February 22, 2005, Engineered Support Systems, Inc.
                  issued a press release announcing its financial results
                  for the three-month period ended January 31, 2005. A copy
                  of that press release is filed as an exhibit to this
                  report and is incorporated here by reference.

                  The information in this report, including the exhibit,
                  shall not be deemed "filed" for purposes of Section 18 of
                  the Securities Exchange Act of 1934 or otherwise subject
                  to the liabilities of that section.

Item  9.01        Financial Statements and Exhibits.

                  (c) The following exhibit is filed as part of this report:

                  Exhibit Number                   Description
                  --------------                   -----------

                       99            Press Release dated February 22, 2005,
                                     issued by Engineered Support Systems, Inc.




                                 SIGNATURES

         Pursuant to the requirements of the Securities Exchange Act of
1934, the registrant has duly caused this report to be signed on its behalf
by the undersigned hereunto duly authorized.

                                   ENGINEERED SUPPORT SYSTEMS, INC.


Date: February 22, 2005      BY: /s/ Gary C. Gerhardt
     -------------------        ----------------------
                                     Gary C. Gerhardt
                                     Vice Chairman and Chief Financial Officer




                                EXHIBIT INDEX


         Exhibit Number                     Description
         --------------                     -----------

              99             Press release dated February 22, 2005, issued
                             by Engineered Support Systems, Inc.