Captain, US Navy (Retired) Selected as a NASA astronaut candidate in May 1984, Culbertson completed basic astronaut training in June 1985. He became lead astronaut at the Shuttle Avionics Integration Laboratory (SAIL); lead of the First Emergency Egress Team; and lead spacecraft communicator (CAPCOM) in the Mission Control Center for seven missions. He flew as the Pilot for STS-38. Following his first flight, he served as the Deputy Chief of the Flight Crew Operations Space Station Support Office, as well as the lead astronaut for Space Station Safety. He was also a member of the team evaluating the hardware and procedures for the proposed mission to dock with the Russian Space Station Mir. Culbertson then served as the Commander for STS-51. Following this flight, Culbertson was Chief of the Astronaut Office Mission Support Branch; then Chief of the Johnson Space Center Russian Projects Office. In 1994, Culbertson was named Deputy Program Manager, Phase 1 Shuttle-Mir, and in 1995 became Manager of the Shuttle-Mir Program. In 2001, Culbertson flew to ISS and served as the Commander of Expedition 3. Culbertson has logged over 146 days in space.