 Eberhart entered the Air Force in 1968 as a graduate of the United States Air Force Academy, having been the cadet wing commander during his senior year.His staff experience includes serving as executive officer to the Air Force Chief of Staff at Headquarters U.S. Air Force; Deputy Chief of Staff for Inspection, Safety and Security, Headquarters Tactical Air Command; Director for Programs and Evaluation, Headquarters U.S. Air Force; Director of Force Structure, Resources and Assessment, the Joint Staff; and Deputy Chief of Staff for Plans and Operations, Headquarters U.S. Air Force.The general has also served as Vice Chief of Staff of the U.S. Air Force, commander, Air Combat Command, Commander, Air Force Space Command, and as commander-in-chief, U.S. Space Command.