National Museum of Nuclear Science & History
J. M. Holliday worked for the J.A. Jones Construction Company.
James Porterie was a security guard at Los Alamos tasked with guarding bomb components. Porterie went to Aberdeen Proving Ground for Ordnance School before volunteering for an assignment at Los Alamos.
C. H. Simpson worked for Clinton Laboratories at the X-10 Reactor.
William Thomas was a staff worker at Los Alamos during the Manhattan Project.