National Museum of Nuclear Science & History
Arthur Sievert worked for Hanley & Company.
Raymond Frank was a metallurgist at the University of Chicago and stayed with the Met Lab after graduating from the university.
Joseph H. Heartberg was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
William “Bill” J. Knox was a research associate at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
