National Museum of Nuclear Science & History
MacDonald was a member of the Instrument Section at the University of Chicago’s Metallurgical Laboratory.
Chastain worked in the United States Engineering District Office.
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.
C. H. Roddy worked for the Tennessee Eastman Corporation at the Y-12 Plant.
