National Museum of Nuclear Science & History
John Baker worked for the Roane-Anderson Company.
Ruska worked for Stone and Webster Engineering Corporation.
John von Neumann was a Hungarian-American mathematician, physicist, and polymath. A child prodigy, by the age of eight he was familiar with calculus and knew Ancient Greek.
Breslow worked at Los Alamos during the Manhattan Project.
O. T. Sibert worked for Clinton Laboratories at the X-10 Reactor.