John Elmer Blaha is a retired United States Air Force colonel and a former NASA astronaut. He is a veteran of five space missions aboard the Space Shuttle and Mir. Blaha is married to the former Brenda I. Walters of St. Louis, Missouri. They have three grown children and four grandchildren.

Charles Frank Bolden Jr. is a former Administrator of NASA, a retired United States Marine Corps Major General, and a former NASA astronaut. A 1968 graduate of the United States Naval Academy, he became a Marine Aviator and test pilot. After his service as an astronaut, he became Deputy Commandant of Midshipmen at the Naval Academy. On May 23, 2009, President Barack Obama announced the nomination of Bolden as NASA Administrator and Lori Garver as Deputy NASA Administrator. Bolden was confirmed by the Senate on July 15, 2009. He was the first African American to head the agency on a permanent basis. On January 12, 2017, Bolden announced his resignation from NASA during a town hall meeting at NASA Headquarters in Washington D.C. His last day would be January 19, and Robert M. Lightfoot Jr. was announced as acting NASA Administrator.

Roy Dubard Bridges Jr. is an American pilot, engineer, retired United States Air Force officer, test pilot, former NASA astronaut and the former Director of NASA's John F. Kennedy Space Center and Langley Research Center. As a command pilot, he has over 4,460 flying hours.

Guy Spence Gardner is a United States Air Force officer and a former astronaut. He holds the rank of Colonel. He flew as pilot on two Space Shuttle missions, STS-27 and STS-35. Gardner was also the 12th president of the Williamson Free School of Mechanical Trades.

Ronald John Grabe is a former NASA astronaut. He has earned the Air Force Distinguished Flying Cross, the Air Medal with 7 Oak Leaf Clusters, the Air Force Meritorious Service Medal, the Liethen-Tittle Award (for Outstanding Student at the USAF Test Pilot School), the Royal Air Force Cross, the NASA Exceptional Service Medal, and NASA Space Flight Medals.

Bryan Daniel O'Connor is a retired United States Marine Corps Colonel and former NASA astronaut.

Richard Noel "Dick" Richards is a retired American naval officer and aviator, test pilot, chemical engineer, and a former NASA astronaut. He flew aboard four Space Shuttle missions in the 1980s and 1990s.

Michael John Smith was an American astronaut—pilot of the Space Shuttle Challenger when it was destroyed during the STS-51-L mission. All seven crew members died.

James Philip Bagian, MD, PE is an American physician, engineer, and former NASA astronaut of Armenian descent. During his career as an astronaut, he logged 337 hours of space-flight, over two missions, STS-29 (in 1989) and STS-40 (in 1991). After leaving NASA in 1995, Bagian was elected as a member of both the National Academy of Engineering and of the Institute of Medicine. Bagian is currently the Director of the Center for Healthcare Engineering and Patient Safety at the University of Michigan.

Franklin Ramón Chang Díaz is a Costa Rican Chinese American mechanical engineer, physicist, former NASA astronaut. He is the founder and current CEO of Ad Astra Rocket Company as well as a member of Cummins' board of directors. He became an American citizen in 1977. He is of Chinese (paternal side) and Costa Rican Spanish (maternal side) descent. He is a veteran of seven Space Shuttle missions, tieing the record, as of 2018 for the most spaceflights (a record set by Jerry L. Ross). He was the third Latin American, but the first Latin American immigrant NASA Astronaut selected to go into space. Chang Díaz is a member of the NASA Astronaut Hall of Fame.

Mary Louise Cleave is an American engineer and a former NASA astronaut. She also served from 2004 to 2007 as NASA Associate Administrator for the Science Mission Directorate.

Bonnie Jeanne Dunbar is a former NASA astronaut. She retired from NASA in September 2005 then served as president and CEO of The Museum of Flight until April 2010. From January 2013 - December 2015, Dr. Dunbar lead the University of Houston's STEM Center (science, technology, engineering and math) and was a faculty member in the Cullen College of Engineering.[1] Currently, she is a professor of aerospace engineering at Texas A&M University and serves as Director of the Institute for Engineering Education and Innovation (IEEI), a joint entity in the Texas A&M Engineering Experiment Station (TEES) and the Dwight Look College of Engineering at Texas A&M University.