National Museum of Nuclear Science & History
Roy Schroeder was a laboratory assistant at the Metallurgical Laboratory in Chicago during the Manhattan Project.
H. C. Smith worked for the United States Engineer District Office.
H. L. Hull worked for the Tennessee Eastman Corporation at the Y-12 Plant.
George Mahfouz joined the Manhattan Project in 1943 when he was offered a job at the Houdaille-Hershey nickel plant in Decatur, Illinois.