National Museum of Nuclear Science & History
Joseph Kouba was a janitor at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Stephen Lawroski was an American chemical engineer who worked on the Manhattan Project at the University of Chicago’s Metallurgical Laboratory from 1944-1946.
John Mench was assigned to the Special Engineer Detachment at Los Alamos where he worked as a pattern maker, creating wooden casts for metal work at the site’s foundry.