National Museum of Nuclear Science & History
Joe Muskin worked for the Roane-Anderson Company.
O. E. Brueggeman worked for the J.A. Jones Construction Company.
Shirley Lewallen was a typist for the Manhattan Project recruitment office in Hanford, Washington between 1942 and 1944.
Manuel Schwartz was a physicist. He worked at Los Alamos as a civilian employee from about July 6, 1944, until January or February 1946.