National Museum of Nuclear Science & History
Melvin A. Miller was a draftsman at the University of Chicago Met Lab. In 1946, he sketched two famous drawings of Chicago Pile-1 based on the descriptions of scientists who were present when it went critical.
S. D. McGee worked for the Edenfield Electric Company.
Hughes worked for Stone and Webster Engineering Corporation.
S. M. Luttrell worked for the Tennessee Eastman Corporation at the Y-12 Plant.