K. L. Mallory

P. P. Barr

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.

J. P. Hogan

J. P. Hogan worked for Hanley & Company.

Ethel G. Moonan

Ethal Moonan was a staff worker at Los Alamos during the Manhattan Project.