National Museum of Nuclear Science & History
Hartman worked for Stone and Webster Engineering Corporation.
Carl Helrich (1895-1971) was a civil engineer for the J.A. Construction Company from 1943 to 1945 and helped construct the Oak Ridge town site and plant area.
Hill worked at the 300 Area at Hanford during the Manhattan Project.
J. D. Gibson worked for the Roane-Anderson Company.
