National Museum of Nuclear Science & History
Long worked for Stone and Webster Engineering Corporation.
Joseph F. Gorman worked in mail and records for the Manhattan Engineer District, first in Syracuse, NY in 1936, then New York City.
Eloy Roybal was a staff worker at Los Alamos during the Manhattan Project.
Ruben Salazar was an employee with Reynolds Electrical and Engineering Company, tasked with doing electrical distribution around Los Alamos.
