National Museum of Nuclear Science & History
Sherman Winters was a janitor at the University of Chicago’s Metallurgical Lab (“Met Lab”) during the Manhattan Project.
Kearns worked for Stone and Webster Engineering Corporation.
Leroy Hartmann (1922 – 1944) was an electrical engineer in the Special Engineer Detachment Manhattan District CE in Oak Ridge.
Bernard Voyten was a staff worker at Los Alamos during the Manhattan Project.