National Museum of Nuclear Science & History
F. I. Irwin worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Austin M. Brues (1906-1991) was the Director of the Biology Division at the Manhattan Project’s Chicago location, the Metallurgical Laboratory (Met Lab).
Hollis worked for Stone and Webster Engineering Corporation.
William Karush (1917-1997) was an American mathematician and physicist. After earning his Ph.D. from the University of Chicago in 1942, Karush worked briefly at the Carnegie Institution of Washington before returning to Chicago to join the Manhattan Project.