Exhibit 21 February 1994 SUBSIDIARIES OF DYNCORP Name of Subsidiary Jurisdiction of Owned* Remarks Incorporation Aerotherm Corporation California Air Carrier Services, Inc. Virginia (2) Anedyn, Inc. Georgia (5) Anedyn Power Company Florida (5) Audio Technical Services Inc. Delaware (5) Cinco Investors, Ltd. Delaware (5) Dyn Funding Corporation Delaware Dyn Logistics Services Inc. California (5) Dyn Marine Services, Inc. California Dyn/Mexico Holdings Inc. Virginia Dyn Network Management, Inc. Virginia Dyn Realty Corporation Virginia Dyn Systems Technology, Inc. Virginia DynAir Caribbean Services, Inc. U.S. Virgin (5) Islands DynAir CFE Services, Inc. Delaware (2) DynAir Fueling Inc. Delaware (2) DynAir Fueling of Nevada Inc. Nevada (2) DynAir Maintenance, Inc. New York (3) DynAir Services Inc. Delaware (2) DynAir Services Russia Inc. Delaware (3) DynAir Tech of Arizona, Inc. Arizona (2) DynAir Tech of Florida, Inc. Florida (2) DynAir Tech of Texas, Inc. Texas (2) DynAir Technical Services, Inc. Delaware (2) (5) DynAir Technologies Virginia (2) International, Inc. Dynalectron Corporation Delaware (1) (1) Dynalectron Systems Inc. Nevada (5) DynCorp Aviation Services, Inc. Virginia DynCorp/DynAir Corporation California (3) DynCorp Aerospace Ops., Inc. Delaware (4) DynCorp Int'l. Services GmbH Germany (4) DynCorp Int'l. Services, Inc. Virginia DynCorp Int'l Services Ltd. Cayman Islands (4) DynCorp Viar Inc. Virginia DynMcDermott Petroleum Louisiana (6) Operations Co. Elec. Utility Construction, Inc. Kentucky (5) Fuller-Austin Insulation Co. Texas (5) Grupo DynCorp de Mexico Mexico (8) Kwajalein Services, Inc. Virginia Meridian Corporation Virginia OLDHD Systems, Inc. Texas (5) Pacific TSD Corporation California (5) Program Resources, Inc. Virginia Sea Mobility, Inc. Delaware (5) TAI Realty Corporation Virginia Technology Applications, Inc. Delaware (7) 395146 Alberta Ltd. Alberta, Canada (5) *Owned 100% by DynCorp unless otherwise specified. NOTES: (1) Owned 100% by DynAir CFE Services, Inc. and formerly known as CFE Equipment Corporation (2) Owned 100% by DynCorp Aviation Services, Inc. (3) Owned 100% by DynAir Services Inc. (4) Owned 100% by DynCorp International Services, Inc. (5) Inactive subsidiaries (6) DynCorp owns 60% of outstanding common stock. (7) DynCorp owns 77% of outstanding Class A common shares (8) DynCorp owns 1 share of common stock and Dyn/Mexico Holdings Inc. owns 99 shares of common stock