National Museum of Nuclear Science & History
Arkie Regnault worked for the Roane-Anderson Company.
Gus Essig began working on the Manhattan Project in May, 1946 in Dayton, Ohio. Essig was selected to work in the highly classified initiator program and spent several months at Los Alamos learning how to design and construct initiators.
Bertrand worked in the United States Engineer District Office.
Matthei worked for Stone and Webster Engineering Corporation.
