National Museum of Nuclear Science & History
Sidney Williams was a janitor at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.
E. H. Gray worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Glen Montgomery was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
E. D. King worked for the J.A. Jones Construction Company.