Andrew J. Stofan

Andrew John Stofan is an American engineer. He worked for the National Aeronautics and Space Administration (NASA) at the Lewis Research Center. In the 1960s he played an important role in the development of the Centaur upper stage rocket, which pioneered the use of liquid hydrogen as a propellant. In the 1970s he managed the Atlas-Centaur and Titan-Centaur Project Offices, and oversaw the launch of the Pioneer 10 and Pioneer 11 probes to Jupiter and Saturn, the Viking missions to Mars, Helios probes to the Sun, and the Voyager probes to Jupiter and the outer planets. He was director of the Lewis Research Center from 1982 to 1986.