National Museum of Nuclear Science & History
Omer Dearen worked for the Roane-Anderson Company.
Smith worked at the 200 West Area at Hanford during the Manhattan Project.
R. J. Guthrie worked for the Watson-Flagg Engineering Company.
Dr. Theron G. Finzel was a chemical engineer/chemist. He worked for DuPont, and was asked to help on the Manhattan Project.