National Museum of Nuclear Science & History
Brock worked for the United States Engineer District Office.
T. D. DeWine worked for the J.A. Jones Construction Company.
Clarence Signaigo was a laboratory helper at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Stalder worked for Stone and Webster Engineering Corporation.
Hennie Schallis was a staff worker at Los Alamos during the Manhattan Project.
