Colonel Brian Duffy is a former NASA astronaut and a veteran of four space shuttle missions. On his last flight, he served as the commander of the second major construction mission of the International Space Station (ISS). He is a graduate of the United States Air Force Academy and a distinguished graduate of the U.S. Air Force Test Pilot School.
Colonel Duffy held many senior positions at NASA, including Technical Assistant to the Director of Flight Crew Operations, Assistant Director, Associate Director, and Deputy Director (Acting) of the Johnson Space Center. After leaving NASA and the Air Force, he held leadership positions at Lockheed Martin and ATK, now a part of Northrop Grumman. Duffy was inducted into the United States Astronaut Hall of Fame in 2016.