 He has commanded a fighter squadron, the United States Air Force Fighter Weapons School, an F-15 wing, an A/OA-10 and F-16 wing, the Combat Air Forces Operational Test and Evaluation Wing, a numbered air force, and Allied Air Forces Southern Europe.Additionally, Keys was the first commander of the Air Force Doctrine Center, and he has served as an executive assistant to the Air Force Chief of Staff and to an Assistant Secretary of Defense.Prior to his current assignment, he was Deputy Chief of Staff for Air and Space Operations, Headquarters U.S. Air Force, Washington, D.C.