Robert Shane Kimbrough is a retired United States Army officer, and a NASA astronaut. He was part of the first group of candidates selected for NASA astronaut training following the Space Shuttle Columbia disaster. Kimbrough is a veteran of two spaceflights, the first being a Space Shuttle flight, and the second being a 6-month mission to the ISS on board a Russian Soyuz craft. He was the commander of the International Space Station for Expedition 50 and later spent 6 months on the ISS as part of the SpaceX Crew-2 mission. He retired from NASA on July 31, 2022.