ENGINEERED SUPPORT SYSTEMS, INC.

EXHIBIT 11 - STATEMENT RE: COMPUTATION OF EARNINGS PER SHARE

(in thousands, except per share data)



Year Ended October 31                                     2002           2001           2000
- --------------------------------------------------------------------------------------------
                                                                            
NET INCOME                                             $23,533        $18,576        $13,040
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BASIC EARNINGS PER SHARE
   Average basic shares outstanding                     15,582         14,036         13,161
- --------------------------------------------------------------------------------------------
      Net income                                       $  1.51        $  1.32        $   .99
============================================================================================
DILUTED EARNINGS PER SHARE
   Average basic shares outstanding                     15,582         14,036         13,161
   Net effect of dilutive stock options(1)                 627          1,180            461
- --------------------------------------------------------------------------------------------
   Average diluted shares outstanding                   16,209         15,216         13,622
- --------------------------------------------------------------------------------------------
      Net income                                       $  1.45        $  1.22        $   .96
============================================================================================

<FN>
(1) Based on the treasury stock method


NOTE: On October 31, 2002, the Company effected a 3-for-2 stock split in the
form of a 50% stock dividend. All share and per share amounts included on
this schedule reflect this stock split.


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