EXHIBIT 21 February 1996 SUBSIDIARIES OF DYNCORP Name of Subsidiary (Active) Aerotherm Corporation Dyn Funding Corporation Dyn Marine Services, Inc. Dyn Marine Services of Virginia, Inc. Dyn/Mexico Holdings, Inc. Dyn Network Management, Inc. Dyn Pacific Aerospace Services, Inc. Dyn Realty Corporation Dyn Systems Technology, Inc. DynAir Services Russia Inc. DynCorp Advanced Repair Technology, Inc. DynCorp Advanced Technology Services,Inc. DynCorp Aerospace Operations, Inc. DynCorp Aerospace Operations (UK) Ltd. DynCorp Aviation Services, Inc. DynCorp Environmental, Energy & National Security Programs,Inc. DynCorp Information & Engineering Technology, Inc. DynCorp International Services GmbH DynCorp International Services Inc. DynCorp International Services Ltd. DynCorp of Colorado, Inc. DynCorp Panama, Inc. DynCorp Tri-Cities Services, Inc. DynCorp Viar Inc. DynEx, Inc. DynTel Corporation Grupo DynCorp de Mexico Kwajalein Services, Inc. TAI Realty Corporation Other Affiliated Companies Advanced Repair Technology International Ltd. Aerospace Center Support (a joint venture) Composite Technology, Inc. DBR (a joint venture) DynKePRO L.L.C. DynMcDermott Petroleum Operations Company ITS Medical Systems L.L.C. NevTech Services Ltd. NewTech (a joint venture) Test & Experimentation Services Co. (a joint venture) Name of Subsidiary (Inactive) Anedyn, Inc. Anedyn Power Company Audio Technical Services Inc. Cinco Investors, Ltd Dyn Logistics Services Inc. DynAir Caribbean Services, Inc. DynAir de Mexico S. A. de C. V. DynAir Services Russia Inc. DynAir Technical Services, Inc. Dynalectron Corporation Dynalectron Systems Inc. Electric Utility Construction, Inc. Fuller-Austin Insulation Company General Systems Engineering, Inc. OLDHD Systems, Inc. Pacific TSD Corporation Sea Mobility Inc. 395146 Alberta Ltd.