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...Joint Filing Agreement • February 13th, 1997 • Mantech International Corp • Services-management services
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.
