Hiss was Secretary-General of the United Nations Conference on International Organization (the convention that created the UN Charter), which was held in San Francisco from 25 April 1945 to 26 June 1945. Allen Weinstein wrote that Andrei Gromyko, the Soviet delegate to the conference, praised Hiss to his superior Stettinus for his "impartiality and fairness". Hiss later became full Director of the State Department's Office of Special Political Affairs. In late 1946, Hiss left government service to become president of the Carnegie Endowment for International Peace, where he served until May 5, 1949, when he was forced to step down.