National Museum of Nuclear Science & History
Sampson Powers worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Geoghegan worked at the 300 Area at Hanford during the Manhattan Project.
Lawier worked in the 300 Area at Hanford during the Manhattan Project.
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.