National Museum of Nuclear Science & History
R. R. Wischmeyer worked for the Midwest Piping and Supply Company.
Robert B. Duffield was a Researcher at the Los Alamos National Laboratory from 1943 to 1946. He later worked at the Argonne National Lab.
Robert R. Williamson was a laboratory assistant and computer at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.