In 1947, the United States transferred control of atomic research from the U.S. Army to civilian authority under the newly created Atomic Energy Commission (AEC). In October 1946, in advance of the commission actually coming into being, Strauss was named by President Truman as one of the first five Commissioners, with David E. Lilienthal as the chairman. Strauss had been recommended for a position on the body by Vice Admiral Paul Frederick Foster, a long-time friend for whom Strauss had earlier provided contacts in the business world (and who had subsequently helped Strauss get his active duty assignment). In their initial discussion about the appointment, Strauss noted to the New Deal-supporting Truman that "I am a black Hoover Republican." Truman said that was of no matter, since the commission was intended to be non-political. Strauss, who had briefly returned to work at Kuhn Loeb after the war, now exited the firm altogether in order to comply with AEC regulations.