National Museum of Nuclear Science & History
J. P. Underwood worked for the Roane-Anderson Company.
Marselis Powell worked for the Union Carbide & Carbon Corporation.
J. Ernest Wilkins Jr. (1923-2011) was a prominent African American mathematician and physicist who worked at the University of Chicago Met Lab during the Manhattan Project.
George Weisiger worked at Oak Ridge during the Manhattan Project, although it remains unknown what his specific duties were.
J. F. McComb, Jr. worked for the Bethlehem Steel Corporation.