NASA Astronaut Thomas H. Marshburn Dr. Thomas H. Marshburn was selected by NASA in 2004. He holds a Bachelor of Science in Physics from Davidson College, North Carolina; a Masters in Engineering Physics from the University of Virginia; a Doctorate of Medicine from Wake Forest University; and a Masters in Medical Science from the University of Texas Medical Branch. The North Carolina native is a veteran of three spaceflights, STS-127, Expedition 34/35, and Expedition 66/67 as part of Crew-3. Prior to becoming an astronaut, Dr. Marshburn served as a Flight Surgeon, assigned to Space Shuttle Medical Operations and to the joint U.S./Russian Space Program and eventually became the Medical Operations Lead for the International Space Station. He served as pilot of the NASA SpaceX Crew-3 mission