National Museum of Nuclear Science & History
Acie Singleton was a laborator helper at the Metallurgical Laboratory in Chicago during the Manhattan Project.
H. L. Gleason worked for the Tennessee Eastman Corporation at the Y-12 Plant.
W. L. Jordan worked for the J.A. Jones Construction Company.
Gilbert Mathis was an electrical engineer at Los Alamos from 1943 to 1946. He was recruited for the Manhattan Project as a member of the US Army Signal Corps.