National Museum of Nuclear Science & History
J. F. McComb, Jr. worked for the Bethlehem Steel Corporation.
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.
Otho Doggett worked for the Roane-Anderson Company.
Spencer Thomas worked for the United States Engineer District Office.
