EXHIBIT 21 SUBSIDIARIES at March 1, 1997 Incorporation Wholly owned subsidiaries of BDM International, Inc.: The BDM Corporation of Saudi Arabia...............................Delaware BDM-Oklahoma, Inc.................................................Delaware BDM Technologies, Inc.............................................Delaware Vinnell Corporation...............................................Delaware BDM Europe BV..............................................The Netherlands Wholly owned active subsidiaries of Vinnell Corporation: Logistics & Transportation Services, Inc..........................Delaware Vinnell Mining and Minerals Corporation.........................California Wholly owned subsidiaries of BDM Europe BV: FACE Holding BV............................................The Netherlands LOGISTICON BV..............................................The Netherlands Partially owned subsidiaries of BDM Europe BV: IABG Holding GmbH..................................................Germany Umwelttechnologie und Sanierungsmanagement GmbH....................Germany Wholly owned subsidiary of IABG Holding GmbH: Industrieanlagen-Betriebsgesellschaft mit beschrankter Haftung.....Germany Partially owned subsidiary of IABG Holding GmbH: Umwelttechnologie und Sanierungsmanagement GmbH....................Germany