National Museum of Nuclear Science & History
N. D. Barker worked for the Tennessee Eastman Corporation at the Y-12 Plant.
A. P. Montgomery worked for the Edenfield Electric Company.
Robert F. Christy (1916-2012) was a Canadian-American theoretical physicist Christy’s doctoral advisor at the University of California, Berkeley was Robert Oppenheimer, but Christy’s initial involvement with the Manhattan Project came at the Metallurgical Lab at the University of Chicago.