Jimmie Pechar

Harold Riley

Harold Riley was an American chemical engineer. After graduating from North Carolina State College, Riley began his career working as a rayon technician at the DuPont Company.

August “Gus” Knuth

August “Gus” Knuth was a millwright and carpenter who helped construct Chicago Pile-1. He was present on December 2, 1942 when the pile went critical in the first self-sustaining chain reaction in history.

Jose L. Garcia

Ray A. Barnard