National Museum of Nuclear Science & History
J. H. Marsh worked for the Kellex Corporation at the K-25 Plant.
Seymour Calvert served for 11 months in the Special Engineering Detachment at Los Alamos. He specialized as a chemical engineer, and carried out experiments with beryllium that were often dangerous.
Jack Pierard was a communications clerk in the Hanford Engineering Works from January 1944 through the end of the war.
Edwards worked at the 100-B Area at Hanford during the Manhattan Project.
