National Museum of Nuclear Science & History
Mathis worked for Stone and Webster Engineering Corporation.
I. H. Jacobson served in the 390th Air Service Group.
Robert Schrader was completing his PhD in chemical engineering at MIT when he was selected to work on the Manhattan Project in Boston.
Julius M. Simmons was an American chemist. He worked as a research assistant at the Metallurgical Laboratory in Chicago during the Manhattan Project.
H.A. Fettinger was a junior physicist at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.