National Museum of Nuclear Science & History
M. E. Gregson worked for the Roane-Anderson Company.
Cummings worked for Stone and Webster Engineering Corporation.
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.
G. H. Griffith worked for the Tennessee Eastman Corporation at the Y-12 Plant.
