National Museum of Nuclear Science & History
James Roberts was a research assistant at the Metallurgical Laboratory in Chicago during the Manhattan Project.
John H. Martens was a research associate and chemist at the University of Chicago Met Lab and a member of the Special Engineer Detachment at Oak Ridge.
Richard Hamming (1915-1998) was an American mathematician who made important contributions to computing.
J. E. Travis worked for the United States Engineer District Office.
Holman worked for Stone and Webster Engineering Corporation.