Ingvi Sigurður Ingvarsson was a Icelandic diplomat. * Ingvi worked for the tax office and the Embassy of the United States in Reykjavik. * In 1956 he entered diplomatic service. * From 1958 to 1962 he was first secretary in Moscow (Sovietunion). * From 1962 to 1966 he was Counselor (diplomat) in Washington, D.C. (United States). * From 1966 to 1971 he was Deputy Permanent Representative of Iceland to North Atlantic Council in Brussels and Counsellor of the embassy in Paris and Brussels. * From 1971 to 1972 he was Deputy Secretary General of the Ministry for Foreign Affairs (Iceland) in Reykjavik. * From 1972 to 1976 he was Permanent Representative next the Headquarters of the United Nations in New York City. * From 8 September 1977 to 2 September 1982 he was ambassador to Stockh