In 1940 , Hickerson became secretary of the American section of the newly formed Permanent Joint Board on Defense . He held this position for the duration of World War II . He also served as Chief of the State Department 's Division of British Commonwealth Affairs in 1944 , and from 1944 to 1947 was Deputy Director of the Office of European Affairs . In this capacity , he was an adviser to the U.S. delegation to the Dumbarton Oaks Conference and to the United Nations Conference on International Organization . In 1947 , he was promoted to Director of the Office of European Affairs . In 1949 , President of the United States Harry Truman nominated Hickerson as Assistant Secretary of State for International Organization Affairs and Hickerson held this office from June 24 , 1949 until July 27 , 1953 . He then spent the next two years as a faculty adviser at the National War College
United Nations Conference on International Organization
United Nations Conference on International Organization
John D. Hickerson