National Museum of Nuclear Science & History
J. R. Siebert worked for the Comstock-Bryant Electric Company.
Waverly Smith was a research associate at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Charles Allen Thomas (1900-1982) was an American chemist and industrial leader. Thomas was recruited to join the Manhattan Project in 1942 by General Groves, who offered him a postion as a deputy to Robert Oppenheimer, the director of the Los Alamos Laboratory in New Mexico.