John Wistar Simpson (25 September 1914 – January 4, 2007) was an electrical engineer, who made significant contributions to the development of the nuclear energy.
[1] Simpson took a two-year leave of absence from Westinghouse in 1946 to work at Oak Ridge National Laboratory where they applied nuclear energy to the generation of power.
When he returned to Westinghouse he became responsible for research and development of nuclear energy generation at the Bettis Atomic Power Laboratory.
In the late 1950s, he organized the Westinghouse Astronuclear Laboratory, with a federal contract to build a nuclear thermal rocket.
He was awarded the IEEE Edison Medal in 1971 "For sustained contributions to society through the development and engineering design of nuclear power systems.