Harold Hasenfus

EngineerOak Ridge, TN

Chicago, ILK-25 Plant

Manhattan Project VeteranMilitary VeteranSpecial Engineer Detachment

Listen to Harold Hasenfus’s Oral History on Voices of the Manhattan Project

Harold Hasenfus was part of the Special Engineer Detachment during the Manhattan Project and worked at the University of Chicago's Metalurgical Laboratory and at the gaseous diffusion plant in Oak Ridge. In Chicago, Hasenfus worked at a pilot plant that was constructed to assist in the design of the B Reactor in Hanford for the production of plutonium.

Harold Hasenfus’s Timeline

1943 Joined the Manhattan Project at Oak Ridge as part of the Special Engineer Detachment.

Related Profiles

Rex E. Gunderson

Tinian Island

Rex E. Gunderson served in the 603rd Air Engineering Squadron.

Donald Ames

Chicago, IL

Donald Ames joined the Manhattan Project as a G.I. at the University of Chicago in 1943. Ames worked under Nobel Prize chemist Glenn Seaborg at the Metallurgical Laboratory, where he helped determine the chemical properties of plutonium and developed a rapid method for measuring the radium concentration in solutions.

Richard F. Recker

Los Alamos, NM

Richard Recker served in the Special Engineer Detatchment (SED) at Los Alamos during the Manhattan Project.

O. D. Cash

Hanford, WA