National Museum of Nuclear Science & History
Carl Neumann worked for the United States Engineer District Office.
Harold Fidler was an Army major and a civil engineer for the Corps of Engineers. Fidler began working at the Radiation Laboratory at Berkeley with Ernest O.
George Placzek was a Czech physicist. He was born in Brno, Moravia, which was then part of Austria-Hungary but today is in the Czech Republic.
Graydon Whitman arrived at Oak Ridge in March 1944, where he began work at the Y-12 separations facility.
Jay Romero was a staff worker at Los Alamos during the Manhattan Project.
