National Museum of Nuclear Science & History
Henry Ward worked for the United States Engineer District Office.
Ingri Prestbo worked for the United States Engineer District Office.
Barbara McLeod worked for the United States Engineer District Office.
Jacob Epting worked as a carpenter in Oak Ridge, TN from November 1942 to October 1943. While Epting assumed he was building a hospital, he was never formally told about the project he was working on.