National Museum of Nuclear Science & History
M. E. Brennan worked for the Watson-Flagg Engineering Company.
W. E. Allender worked for the Fercleve Corporation.
Ellsworth Risley was a staff worker at Los Alamos during the Manhattan Project.
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.
