National Museum of Nuclear Science & History
Ulysses Alley worked for the Fercleve Corporation.
Richard Emanatian was with the military police detachment at Los Alamos during the war. He maintained secrecy through the rest of his life, and his family only found about his involvement long after his death.
Calvin S. Shepherd worked on the Manhattan Project at Los Alamos, NM and the Trinity Site.
J. A. Phillips worked for the Roane-Anderson Company.