National Museum of Nuclear Science & History
Sidney Williams was a janitor at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.
J. B. Fletcher worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Paul was a physicist at Los Alamos during the Manhattan Project.
Henry Jarrell, Jr. worked for the Kellex Corporation at the K-25 Plant.
Marvin Smith worked for Clinton Laboratories at the X-10 Reactor.