Tom Marshburn

Dr. Thomas H. Marshburn is an American physician, former NASA astronaut, and current Chief Astronaut & VP of Human Factors Engineering at Sierra Space. Selected as an astronaut in 2004 after serving as a NASA flight surgeon, he flew three space missions: STS-127 (2009), Expedition 34/35 (2012-2013), and Crew-3/Expedition 66/67 (2021-2022), accumulating 337 days in space and over 24 hours of spacewalks.[1][2][7][8]