National Museum of Nuclear Science & History
Virginia Cowan worked for the Tennessee Eastman Corporation at the Y-12 Plant.
William Browne worked for the H. K. Ferguson Company.
Richard Emanatian was with the military police detachment at Los Alamos during the war. He maintained secrecy through the rest of his life, and his family only found about his involvement long after his death.
Ilse Perlman was a staff worker at Los Alamos during the Manhattan Project.