Marshburn is a Statesville, North Carolina, native who became an astronaut in 2004. Prior to serving in the astronaut corps, the medical doctor served as flight surgeon at NASA’s Johnson Space Center in Houston and later became medical operations lead for the International Space Station. The Crew-3 mission will be his third visit to the space station and his second long-duration mission. Marshburn previously served as a crew member of STS-127 in 2009 and Expedition 34/35, which concluded in 2013.

Maurer comes from Sankt Wendel, in the German state of Saarland. Like Chari, Maurer will be making his first trip to space with the Crew-3 mission. When Chari, Marshburn, and Maurer arrive at the orbiting laboratory, they will become expedition crew members for the duration of their six-month stay.