National Museum of Nuclear Science & History
W. G. Chmielewski was a carpenter at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
B. B. Shaeffer worked for the Roane-Anderson Company.
Manuel Schwartz was a physicist. He worked at Los Alamos as a civilian employee from about July 6, 1944, until January or February 1946.
P. A. Dahlen worked at the 100-D Area at Hanford during the Manhattan Project.