National Museum of Nuclear Science & History
R. R. Wischmeyer worked for the Midwest Piping and Supply Company.
Ruska worked for Stone and Webster Engineering Corporation.
C. A. Nichols worked for the Roane-Anderson Company.
Hardin worked in the United States Engineer District Office.
Philip C. Leahy was a Second Lieutenant for the U.S. Army Corps of Engineers who began his work for the Manhattan Project at the Metallurgical Laboratory at the University of Chicago, Illinois.
