Ronald "Ron" Michael Sega is professor of systems engineering and Vice President for Energy and the Environment at the Colorado State University Research Foundation, a non-profit advocacy organization supporting CSU. He is also the Vice President and Enterprise Executive for Energy and Environment at The Ohio State University. From August 2005 to August 2007, he served as Under Secretary of the Air Force. He is a retired Major General in the United States Air Force and a former NASA astronaut. Sega was born in Cleveland, Ohio, he is of Slovene origin. He was married to fellow astronaut Bonnie J. Dunbar. He is now married to Ann Sega and they have two sons. He has lived in both Northfield, Ohio and Colorado Springs.

Donald Alan Thomas, Ph.D. is an American engineer and a former NASA astronaut.

Carl Erwin Walz is a former NASA astronaut currently working for Orbital Sciences Corporation's Advanced Programs Group as Vice President for Human Space Flight Operations. Walz was formerly assigned to the Exploration Systems Mission Directorate at NASA Headquarters in Washington, DC. He was the Acting Director for the Advanced Capabilities Division in the Exploration Systems Mission Directorate, and was responsible for a broad range of activities to include Human Research, Technology Development, Nuclear Power and Propulsion and the Lunar Robotic Exploration Programs to support the Vision for Space Exploration.

Peter Jeffrey Kelsay Wisoff is an American physicist and former NASA astronaut. Wisoff qualified as mission specialist and flew in four manned Space Shuttle missions, with his first launch in 1993 and his last in 2000.

David Alexander Wolf is an American astronaut, medical doctor and electrical engineer. Wolf has been to space four times. Three of his spaceflights were short-duration Space Shuttle missions, the first of which was STS-58 in 1993, and his most recent spaceflight was STS-127 in 2009. Wolf also took part in a long-duration mission aboard the Russian space station Mir which lasted 128 days, and occurred during Mir EO-24. He was brought to Mir aboard STS-86 in September 1997, and landed aboard STS-89 in January 1998. In total Wolf has logged more than 4,040 hours in space. He is also a veteran of 7 spacewalks totaling 41hrs 17min in both Russian and American spacesuits.

Janice Elaine Voss was an American engineer and a NASA astronaut. She flew in space five times, jointly holding the record for American women. Voss died on February 6, 2012, from breast cancer.

Brent Ward Jett Jr. is a retired American naval officer and aviator, test pilot, aerospace and aeronautical engineer, and NASA astronaut.

Kevin Richard Kregel is an American former astronaut, and former member of the Space Launch Initiative Project at the Lyndon B. Johnson Space Center.

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 on type. He joined ATK Launch Systems Group in 2006 as Vice President of Advanced Programs.

Daniel Thomas Barry is an American engineer, scientist, and a retired NASA astronaut. He was a contestant on the CBS reality television program Survivor: Panama, as well as on BattleBots on ABC. He was at Singularity University from 2009–2012, where he was co-chair of the Faculty of Artificial Intelligence and Robotics and the chair of the graduate summer program. He is also a co-founder of Fellow Robots, a telepresence robotics company and the founder and president of Denbar Robotics.

Charles Eldon Brady Jr. was an American physician, a Captain in the United States Navy and a NASA astronaut. He spent 16 days in space on the STS-78 flight in 1996. Brady specialized in sports medicine and worked as team physician at several universities before joining the US Navy in 1986. There he became a flight surgeon, serving with the Blue Angels from 1988-1990. In 1992 he was selected for NASA's astronaut program and completed training to prepare for space flight. After serving in the astronaut program, he returned full-time to the Navy and served as flight surgeon at Whidbey Island Naval Air Station in the San Juan Islands before retiring in the Pacific Northwest.

Catherine Grace "Cady" Coleman is an American chemist, a former United States Air Force officer, and a former NASA astronaut. She is a veteran of two Space Shuttle missions, and departed the International Space Station on May 23, 2011, as a crew member of Expedition 27 after logging 159 days in space.