National Museum of Nuclear Science & History
R. A. Johnston worked for the United States Engineer District Office.
Felix Sandoval was a staff worker at Los Alamos during the Manhattan Project.
MacDonald worked for Stone and Webster Engineering Corporation.
Edward Shapiro was an American scientist and Manhattan Project veteran. After receiving a Ph.D. from Purdue University, Shapiro worked as a research associate for the Manhattan Project at the Metallurgical Laboratory in Chicago and at Oak Ridge.
Hilda Holzman worked for the United States Engineer District Office.