CUSIP No. 36227K 10 6 Page 10
Exhibit A
JOINT FILING AGREEMENT
In accordance with Rule 13d-1(f) under the Securities Exchange Act of
1934, as amended, the persons named below hereby agree to the joint filing on
behalf of each of them of a Statement on Schedule 13G (including amendments
thereto) with respect to the common stock of GSE Systems, Inc. and further agree
that this Joint Filing Agreement, which may be executed in one or more
counterparts, be included as an Exhibit to such statement.
IN WITNESS WHEREOF, the undersigned have executed this Joint Filing
Agreement as of February 13, 1997.
MANTECH INTERNATIONAL CORPORATION
By: /s/ XXXX X. XXXXX, XX.
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Xxxx X. Xxxxx, Xx.
Chief Financial Officer
/s/ XXXXXX X. XXXXXXXX
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Xxxxxx X. Xxxxxxxx
/s/ XXXX X. XXXXX, XX.
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Xxxx X. Xxxxx, Xx.