John Roberts was a staff worker at Los Alamos during the Manhattan Project.
John E. Brolley
John Brolley was a research assistant at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Russell McNutt (1914-2008) was a civil engineer for the Kellex Corporation and Soviet atomic spy. Both studying engineering in New York, McNutt befriended Julius Rosenberg, one of the most well-known Soviet spies and recruiters.