National Museum of Nuclear Science & History
Jas Ellis worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Crawford Greenewalt (1902-1993) was an American chemical engineer. He was one of the managers of the Manhattan Project for DuPont.
Wangelin worked at the 200 East and 200 West Areas at Hanford during the Manhattan Project.
Frank Graham worked for the Midwest Piping and Supply Company.
Beers worked for Stone and Webster Engineering Corporation.