National Museum of Nuclear Science & History
J. J. Morrissey worked for the United States Engineer District Office.
Williams worked for Stone and Webster Engineering Corporation.
Ben Benjamin was a sergeant in the Special Engineer Detachment during the Manhattan Project. He had previously worked in industry making lenses and prisms, and was assigned to the Optics Group to help with photographing the Trinity Test.
M. J. Gustafson worked for the J.A. Jones Construction Company.
