Pamela Melroy is a retired United States Air Force officer and a former NASA astronaut. She served as pilot on Space Shuttle missions STS-92 and STS-112 and commanded mission STS-120 before leaving the agency in August 2009. After serving as Deputy Program Manager, Space Exploration Initiatives with Lockheed Martin. She joined the Federal Aviation Administration in 2011, where she was a senior technical advisor and director of field operations for the FAA’s Office of Commercial Space Transportation. In 2013, she left the FAA and joined DARPA as Deputy Director of the Tactical Technology Office.
She was the second woman to command a space shuttle mission (after Eileen Collins).The STS-120 crew visited the station during Expedition 16, commanded by Peggy Whitson. Whitson was the first female ISS commander, making the STS-120 mission the first time that two female mission commanders were in orbit at the same time.
She has logged over 924 hours (over 38 days) in space.