Mr. Scimemi has been a leader in human spaceflight for 30 years. He started his career at the Johnson Space Center in the Shuttle program 2 months prior to the Challenger accident. He has worked as a civil servant and in private industry. He has been employed at four NASA centers: Johnson Space Center, Ames Research Center, Goddard Space Flight Center, and Headquarters. His experience spans human spaceflight, Earth and space science including programs such as Space Shuttle, Hubble, Space Station, SOFIA, NPP and many others. Most of his technical career has been spent in flight software and avionics development, testing and operations as well spacecraft level integration. He has been at NASA Headquarters since 2003.