Patrick J. Joyce

Carl S. Helrich, Sr.

Carl Helrich (1895-1971) was a civil engineer for the J.A. Construction Company from 1943 to 1945 and helped construct the Oak Ridge town site and plant area.

John W. Richter

Attended the University of Illinois.

John R. Klein

John Klein was a member of the Special Engineering Detachment. He worked at the Metallurgical Lab at the University of Chicago and at Los Alamos.

Robert W. Baun