National Museum of Nuclear Science & History
Harry Reason was a janitor at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Winston Grice was a millwright at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Acie Singleton was a laborator helper at the Metallurgical Laboratory in Chicago during the Manhattan Project.
H. B. Mills worked for the United States Engineer District Office.
Haynes worked at the 200 East Area at Hanford during the Manhattan Project.