George Mueller (pronounced "Miller"), born July 16, 1918, was Associate Administrator of the NASA Office of Manned Space Flight from September 1963 until December 1969. Hailed as one of NASA's "most brilliant and fearless managers", he was instrumental in introducing the all-up testing philosophy for the Saturn V launch vehicle, which ensured the success of the Apollo program in landing a man on the Moon and returning him safely to the Earth by the end of 1969.