Terrence Wade Wilcutt is a United States Marine Corps officer and a former NASA astronaut. He is a veteran of four Space Shuttle missions. Wilcutt was NASA's Chief of Safety and Mission Assurance, until his retirement from NASA in December 2020.
Frederick Hamilton "Rick" Hauck is a retired captain in the United States Navy, a former fighter pilot and NASA astronaut. He piloted Space Shuttle mission STS-7 and commanded STS-51-A and STS-26.
Dale Allan Gardner was a NASA astronaut, and naval flight officer who flew two Space Shuttle missions during the mid 1980s.
Kent Vernon "Rommel" Rominger is an American former astronaut, former NASA Chief of the Astronaut Office at Johnson Space Center, and a captain in the United States Navy. Rominger holds the Space Shuttle Orbiter flight time record with 1610 hours. He joined ATK Launch Systems Group in 2006 as Vice President of Advanced Programs.
Norman Earl Thagard, is an American scientist and former U.S. Marine Corps officer and naval aviator and NASA astronaut. He is the first American to ride to space on board a Russian vehicle, and can be considered the first American cosmonaut. He did this on March 14, 1995, in the Soyuz TM-21 spacecraft for the Russian Mir-18 mission.
Michael Allen Baker is a retired captain in the United States Navy, former NASA astronaut, and the International Space Station Program Manager for International and Crew Operations, at NASA's Johnson Space Center. He is responsible for the coordination of program operations, integration and flight crew training and support activities with the International Partners.
Robert Donald Cabana is the Associate Administrator of the National Aeronautics and Space Administration (NASA), a NASA astronaut, and a veteran of four Space Shuttle flights. He served as Chief of the Astronaut Office from 1994 to 1997 and as director of the John F. Kennedy Space Center from 2008 to 2021. He is also a former naval flight officer and naval aviator in the United States Marine Corps.
John Oliver Creighton, , is a former NASA astronaut who flew three Space Shuttle missions.
Lloyd Blaine Hammond Jr. is a Gulfstream test pilot, a former United States Air Force officer, and a former NASA astronaut. He flew on two Space Shuttle missions.
Kathryn Patricia "Kay" Hire is a former NASA astronaut and Captain in the U.S. Navy Reserve who has flown aboard two Space Shuttle missions.
Charles Owen Hobaugh is a former NASA astronaut and a retired U.S. Marine Corps officer. He has had three spaceflights, all of which were Space Shuttle missions to the International Space Station, lasting between 10 and 13 days.
Brent Ward Jett Jr., , is a retired American naval officer and aviator, test pilot, aerospace and aeronautical engineer, and NASA astronaut.
Frank Lee Culbertson Jr. is an American former naval officer and aviator, test pilot, aerospace engineer, NASA astronaut, graduate of the US Naval Academy, and member of the United States Astronaut Hall of Fame. He served as the commander of the International Space Station for almost four months in 2001 and was the only U.S. citizen not on Earth when the September 11 attacks occurred.
Bryan Daniel O'Connor is a retired United States Marine Corps Colonel and former NASA astronaut. He was inducted into the United States Astronaut Hall of Fame in 2008.
Philippe Perrin is a French test pilot, engineer and former CNES and European Space Agency astronaut. He served as mission specialist on the STS-111 mission where he conducted three spacewalks attaching new hardware to the International Space Station and replacing a wrist joint on the Canadarm2.
Frederick Wilford Sturckow is an engineer, retired United States Marine Corps officer, former NASA astronaut, and commercial spacecraft pilot. Sturckow is a veteran of four Space Shuttle missions. He flew on STS-88 and STS-105 as a pilot and STS-117 and STS-128 as a commander. All four missions docked with the International Space Station, making Sturckow one of three American astronauts to visit the station four times. Sturckow later was assigned to the Johnson Space Center as a CAPCOM. He left NASA in 2013 to become a pilot for Virgin Galactic.
Kenneth Todd "Hock" Ham is a retired American astronaut and a captain in the United States Navy. Ham was selected for NASA's astronaut program in August 1998, while serving as the F/A-18E/F Super Hornet lead carrier suitability test pilot. Ham's aviator call sign is "Hock". Ham traveled to space twice as part of the Space Shuttle program. He flew on STS-124 as pilot and then on STS-132 as mission commander.
George David "Zambo" Zamka is a former NASA astronaut and United States Marine Corps pilot with over 3500 flight hours in more than 30 different aircraft. Zamka piloted the Space Shuttle Discovery in its October 2007 mission to the International Space Station and served as the commander of mission STS-130 in February 2010.
Gregory Carl "Ray J" Johnson, , is a retired American naval officer and naval aviator, test pilot, aerospace engineer, and NASA astronaut. He spent his military career in both the regular United States Navy and the Navy Reserve. Johnson was the pilot on Space Shuttle mission STS-125, the final Hubble Space Telescope servicing mission.
Douglas Gerald Hurley is an American engineer, former Marine Corps pilot and former NASA astronaut. He piloted Space Shuttle missions STS-127 and STS-135, the final flight of the Space Shuttle program. He launched into space for the third time as commander of Crew Dragon Demo-2, the first crewed spaceflight from American soil since STS-135 and became, together with Bob Behnken, the first astronaut in history launching aboard a commercial orbital spacecraft. He was also the first Marine to fly the F/A-18 E/F Super Hornet. His call sign is "Chunky", and he was sometimes referred to by this name on the communication loops.
