National Museum of Nuclear Science & History
R. J. Guthrie worked for the Watson-Flagg Engineering Company.
Marjorie Hall Bradner was a secretary at Los Alamos during the Manhattan Project. She was also the wife of Los Alamos physicist Hugh Bradner.
W. C. Marr worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Edward Denari worked for the Kellex Corporation at the K-25 Plant.