National Museum of Nuclear Science & History
Crawford worked in the United States Engineer District Office.
Gordon Simmons worked for the J.A. Jones Construction Company.
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.
F. J. Ward worked for the J.A. Jones Construction Company.
