Enlisted for four years in the United States Air Force. Worked for four years in the Shuttle/Centaur Guidance & Navigation group, General Dynamics, San Diego CA. Worked for eight years as a first level supervisor in the Titan IV/Centaur Guidance & Navigation group, Martin Marietta, Denver CO. Worked for four years as a Mission Lead in the Titan IV/Centaur Flight Software group, Lockheed Martin, Denver CO. This task included Launch Support activities. Worked for six months as the J-1 Upgrade Guidance and Navigation Lead Engineer, Lockheed Martin, Denver CO. Began working in 1999 as a Software Engineer on various space missions, Lockheed Martin, Denver CO. Also worked for nine months testing the flight software for the first Atlas V flight.