National Museum of Nuclear Science & History
Rein worked for Stone and Webster Engineering Corporation.
James J. Nickson was a medical doctor and Section Chief of H-III Medical Industrial Hazards and Health Physics in the Health Division at the University of Chicago Met Lab.
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.