Garrett Erin Reisman is an American engineer and former NASA astronaut. He was a backup crew member for Expedition 15 and joined Expedition 16 aboard the International Space Station for a short time before becoming a member of Expedition 17. He returned to Earth on June 14, 2008 on board STS-124 on Space Shuttle Discovery. He was a member of the STS-132 mission that traveled to the International Space Station aboard Space Shuttle Atlantis from May 14 to 26, 2010. He is currently the Director of Space Operations at SpaceX and a Professor of Astronautics Practice at the University of Southern California's Viterbi School of Engineering.