J. P. Griffin

Lorraine Olson

Ross C. Hill

Ross Hill worked for the United States Engineer District Office.

Theron G. Finzel

Dr. Theron G. Finzel was a chemical engineer/chemist. He worked for DuPont, and was  asked to help on the Manhattan Project.

T. J. O’Donnell

T. J. O’Donnell was the Shop Chief at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.