National Museum of Nuclear Science & History
Eric Smith worked for the Kellex Corporation at the K-25 Plant.
Herbert M. Parker (1910-1984) was a British-American medical physicist. He worked at Chicago, Oak Ridge, and Hanford during the Manhattan Project, and is perhaps best known for inventing the rep (a precursor of the rad) and helping develop the rem to measure radiation dosage.
Hutchins worked at the 300 Area at Hanford during the Manhattan Project.
E. J. Beever worked for the Union Carbide & Carbon Corporation.