Education: B.S. in Aeronautical Engineering, University of Minnesota, 1949.

Spaceflights: Docking Module pilot, Apollo-Soyuz Test Project, (1975)

Chosen as command pilot for Mercury-Atlas 7 (Aurora 7), but was removed after a heart murmur was detected. Resigned his commission from the Air Force in November 1963, but continued as an active member of the astronaut team, becoming Director of Flight Crew Operations, a position he held until February 1974. Returned to flight status in March 1972 and was docking module pilot for the Apollo-Soyuz Test Project. Later worked as manager for the shuttle orbital flight tests.

Left NASA in February 1982 and helped found Space Services, Inc., Houston, Texas.

Was director of Space Services at the time of his death on June 13, 1993 of brain cancer.