 Following an educational delay to earn a Master of Business Administration degree from Bryant College in Rhode Island, he entered active duty in August 1975.General Sheridan's experience includes acquisition leadership of aircraft, simulator and classified space programs; requirements development across all Air Force space programs; and operational leadership in four different national space programs.He has served as military assistant to the Assistant Secretary of the Air Force for Space, and as the Commandant of Air Command and Staff College, Maxwell Air Force Base, Alabama.