From May 18, 1956 to 1957 he was ambassador in Paris.[3] On June 22, 1957 he was appointed ambassador in Washington, D.C., where he was accredted from August 2, 1957 to November 18, 1958. From August 21, 1957 to June 5, 1962 he was Permanent Representative next the Headquarters of the United Nations. From June 5, 1962 to May 10, 1964 he was ambassador in New Delhi.