National Museum of Nuclear Science & History
S. H. Hall worked for the Roane-Anderson Company.
Elbert Lowdermilk owned and operated the construction company that connected the Los Alamos laboratory to the rest of the country throughout World War II.
Duane Sewell began working with the Manhattan Project in 1941. He was one of the first people to arrive at Oak Ridge and experienced first-hand some of the difficulties there with cyclotrons and isotope separation.