Richard Mastracchio is an American astronaut and engineer who was born on November 11, 1950. He earned a Bachelor of Science degree in Electrical Engineering from University of Connecticut and a Master of Science in Electrical Engineering from University of Southern California. Mastracchio was selected as a NASA astronaut in 1990 and has completed multiple spaceflights. Throughout his career, Mastracchio has participated in several missions, including STS-106, STS-118, and STS-131. He has spent a total of over 200 days in space and conducted numerous spacewalks, contributing to the assembly and maintenance of the International Space Station.