A former Marine aviator, NASA astronaut, Space Shuttle pilot/commander, as well as an executive at the FAA. During his time with the U.S. Marines he served as a test pilot, maintenance officer, and weapons and tactics instructor. While at the FAA he served as Deputy Associate Administrator for Commercial Space Transportation. He later worked on expandable space stations while Director of the BA330 Crew and Cargo Program at Bigelow Aerospace, and remains active in the space and aviation sectors. He holds an undergraduate mathematics degree for the US Naval Academy and a Masters of Science in Engineering Management from the Florida Institute of Technology.