Frank V. Laska

W. F. Randall

R. E. Engel

Engel worked in the United States Engineer District Office.

Elizabeth Painter

Elizabeth Painter (later Elizabeth Painter Marcus) was an associate biologist in the Health Division at the University of Chicago Metallurgical Laboratory.

James McIntosh

James McIntosh was a draftsman at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.