Leonard Krouldis

Laboratory AssistantChicago, IL

Manhattan Project VeteranProject Worker/Staff

Leonard Krouldis was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Related Profiles

William S. Hartnett

Hanford, WA

Bill Hartnett worked in plutonium metallurgy for the Manhattan Project at the Hanford Engineer Works from January 1943 to December 1946.

C. Galm

Washington, DC

C. Galm worked for the Roane-Anderson Company.

George W. Marquardt served as a captain in the 393rd Bombardment Squadron. Although he was regularly assigned to the Up An’ Atom, he flew in the mission to bomb Hiroshima as the aircraft commander of the Necessary Evil.