Clark George Fiester (January 25, 1934 – April 17, 1995) was an American businessman who served as Assistant Secretary of the Air Force (Acquisition) from 1993 until his death in a plane crash in 1995.

In 1957, Fiester joined GTE Government Systems Corp. (which would be acquired by General Dynamics in 1999), a company that designed and developed information security, electro-optics, and automated airport weather stations.

[2] Fiester was associated with GTE Government Systems Corp. for his entire career, eventually becoming a group vice president and general manager.

[2] On November 1, 1993, President of the United States Bill Clinton nominated Fiester to be Assistant Secretary of the Air Force (Acquisition), and he subsequently held office until his death.

[3] President Clinton granted a presidential waiver to allow Fiester to be buried in Arlington National Cemetery.