National Museum of Nuclear Science & History
MacDonald was a member of the Instrument Section at the University of Chicago’s Metallurgical Laboratory.
Lois Roy worked for the United States Engineer District Office.
Charles R. Oxley served in the 1027th Air Material Squadron.
Harry Grisham worked for the Kellex Corporation at the K-25 Plant.
Marion L. Arnold was a staff member at Los Alamos during the Manhattan Project.