National Museum of Nuclear Science & History
M. M. Marshall worked for the Roane-Anderson Company.
David Halsey worked for the J.A. Jones Construction Company.
A. L. DeSpain worked at the 200 East Area at Hanford during the Manhattan Project.
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.
