National Museum of Nuclear Science & History
H. W. Butsch worked for the William A. Pope Company.
Jesse Kupferberg was a Technical Sargeant in the US Army who participated in Project Alberta, the group tasked with transporting and assembling the two atomic bombs in 1945.
Lyman Brenneman was a member of the Special Engineer Detachment at Oak Ridge and was assigned to the K-25 Power Plant.
Gundberg worked for Stone and Webster Engineering Corporation.