National Museum of Nuclear Science & History
M. S. Headley worked for the J.A. Jones Construction Company.
Daniel J. Keefe was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Sherman D. Kaplan was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
John Geffel worked at Oak Ridge as the Prime Building Contractor for Construction of the Oak Ridge facilities.
