National Museum of Nuclear Science & History
E. W. Montgomery worked for the United States Engineer District Office.
Ida Cunningham was a laboratory assistant in the Chemistry Division of the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Norene Mann was a secretary at the University of Chicago Met Lab. She worked for Nobel laureate James Franck, but often also acted as a secretary for Leo Szilard.
J. F. McComb, Jr. worked for the Bethlehem Steel Corporation.