NASA - National Aeronautics and Space Administration

Commander Oleg Kotov

Flight Engineer Sergey Ryzansky

Flight Engineer Michael Hopkins

Flight Engineer Richard Mastracchio

Rick Mastracchio served as a mission specialist for shuttle missions STS-106, STS-118 and STS-131 which visited the International Space Station. He will be flight engineer for Expedition 38/39.

Flight Engineer Koichi Wakata

Japanese astronaut Koichi Wakata flew to the station on STS-119 and served as flight engineer for Expeditions 18, 19 and 20. Wakata will serve as Expedition 38 flight engineer and become Japan's first station commander during Expedition 39.

Flight Engineer Mikhail Tyurin

Mikhail Tyurin served as Flight Engineer for Expeditions 3 and Expedition 14. He accumulated a total of 340 days in space including 25 hours and 32 minutes of spacewalk time in 5 spacewalks.