Ilkka Olavi Pastinen (17 March 1928 – 12 January 2018) was a Finnish ambassador who also served as Deputy Secretary General of the United Nations.
[citation needed] Pastinen then served as Ambassador to the Permanent Representation to the United Nations and Deputy Representative to the UN and the UN Security Council in 1969–1970 as UN Assistant Secretary General and Special Representative of the UN Secretary General on Disarmament Issues in Geneva and New York from 1971 to 1974 as the Negotiating Officer of the Ministry of Foreign Affairs, 1977 as Ambassador and UN Permanent Representative in New York, 1977–1983.
[citation needed] Pastine was an expert and later member of the Finnish delegation in the UN General Assembly, 1957–1961, 1965, 1969, and 1975–1976, as deputy chairman of the delegation in 1970 and Secretary General of the UN's Special Representative in the Conference of the Disarmament matters in Geneva and New York from 1971 to 1974, and as the Negotiating Officer of the Ministry of Foreign Affairs, 1975–1977, and Ambassador and UN Permanent Representative in New York, 1977–1983.
[citation needed] At the end of the 1960s and early 1970s, Pastin belonged to the Ministry of Foreign Affairs' group called the Junta of the Colonels which included diplomats as Max Jacobson, Aarno Karhilo, Aimo Pajunen, Risto Hyvärinen and Keijo Korhonen.
[citation needed] The Junta of the Colonels tried to promote Jacobson as UN Secretary General with poor success in 1971.