National Museum of Nuclear Science & History
Violet Jones worked for the United States Engineer District Office.
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.
L. E. Johnston worked for the United States Engineer District Office.
T. D. DeWine worked for the J.A. Jones Construction Company.