DynCorp International LLC had its origins in 1946 with the founding of the company subsequently known as Dynalectron Corporation and later as DynCorp. In 1951, Dynalectron’s aerospace division was awarded its first contract to provide Contract Field Teams (CFT) to the United States Department of Defense. Contract field teams provide mission support and depot-level repair to aircraft and weapons systems. They are highly mobile, quick-response teams that are deployed world-wide to supplement a customer's own workforce. DynCorp International LLC and its predecessors have provided services for the CFT program continuously for the last 55 years.

In 1998, DynCorp established DynCorp Technical Services, Inc. (DTS), and in accordance with applicable Federal statutes, transferred its existing aerospace and international division contracts, including contracts now held by DynCorp International, to DTS.

In 2000, DynCorp formed DynCorp International LLC, and with the approval of the United States government, transferred to it all of its international contracts. DynCorp Technical Services LLC continued to perform certain of DynCorp’s domestic contracts.

On March 7, 2003 , DynCorp became a wholly owned subsidiary of Computer Sciences Corporation (CSC). CSC became the ultimate parent of DynCorp’s subsidiaries, including DynCorp Technical Services LLC and DynCorp International LLC, which remained subsidiaries of DynCorp.

In 2004, CSC made a strategic decision to divest of its non-core businesses, including security and aircraft maintenance services. Effective June 7, 2004 , the US government approved the transfer of those government prime contracts to DTS Aviation Services, Inc. (now DTS Aviation Services LLC).

On December 12, 2004, DynCorp, a wholly owned subsidiary of Computer Sciences Corporation (CSC), entered into an agreement to sell its equity interests in DynCorp International LLC, Dyn Marine Services LLC, and DTS Aviation Services, Inc., among others, to DI Acquisition Corp. (later renamed DynCorp International Inc.), a wholly owned subsidiary of Veritas Capital Fund II, L.P. This transaction occurred on February 11, 2005.