National Museum of Nuclear Science & History
Thompson worked for Stone and Webster Engineering Corporation.
Philipp Klein was a part-time switchboard operator in the SAM Lab while studying chemical engineering at Columbia University.
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.
James J. Johnson served in the 603rd Air Engineering Squadron.
Elizabeth was a staff member at Los Alamos during the Manhattan Project. She may have been married to Claire C.
