Mr. Mastracchio is a NASA astronaut stationed at the Johnson Space Center, Houston. He joined NASA in 1990 as an engineer in the Flight Crew Operations Directorate and later worked as an ascent/entry Guidance and Procedures Officer (GPO) in Mission Control. During that time, he supported 17 missions as a flight controller. He was selected as an astronaut candidate in 1996 and flew as a mission specialist on STS-106. He has logged over 283 hours in space. Currently, he is assigned to the crew of STS-117, scheduled for flight in the fall of 2003. Earlier in his career, Mr. Mastracchio worked for Hamilton Standard (now Hamilton Sundstrand) as a systems design group engineer, and later the Rockwell Shuttle Operations Company at the Johnson Space Center.