National Museum of Nuclear Science & History
E. J. Risdon worked for the Roane-Anderson Company.
Robert H. Brown was a chemical engineer/metallurgist. He was educated at Drexel University and Massachusetts Institute of Technology.
Wilcox P. Overbeck was a research associate and instrumentation designer at the Chicago Met Lab. He was responsible for calling out the neutron count when Chicago Pile-1 went critical on December 2, 1942.
W. N. Wentworth worked for the Roane-Anderson Company.
Livingstone worked for Stone and Webster Engineering Corporation.