National Museum of Nuclear Science & History
H. Cohen worked for the Roane-Anderson Company.
Lee W. Trybell worked in the shop at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Casmer Lesnioski worked in the shop at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Hayes worked in the United States Engineer District Office.
L. A. Castellanos worked for the J.A. Jones Construction Company.
