Olexander Motsyk (born 3 May 1955) is a Ukrainian diplomat.

Ambassador Extraordinary and Plenipotentiary (1999) 07.1981-05.1985 — Third secretary, Consular Department, Ministry of Foreign Affairs of Ukraine 05.1985-04.1987 — Third, Second Secretary, Department of International Organizations, Ministry of Foreign Affairs of Ukraine 04.1987-09.1990 — Second, First secretary, HR Department, Ministry of Foreign Affairs of Ukraine 09.1990-04.1992 — First secretary, Directorate General for Treaties and Legal Affairs, Ministry of Foreign Affairs of Ukraine 04.1992-08.1995 — Second, First Secretary, Counselor, Permanent Mission of Ukraine to the UN, New York City 08.1995-11.1997 — Director General, Directorate General for Treaties and Legal Affairs, Ministry of Foreign Affairs of Ukraine 11.1997-11.2001 — Ambassador Extraordinary and Plenipotentiary of Ukraine to the Republic of Turkey 11.2001-07.2003 — Deputy State Secretary, Ministry of Foreign Affairs of Ukraine 07.2003-07.2004 — Deputy Minister, Ministry of Foreign Affairs of Ukraine 07.2004-02.2005 — First Deputy Minister for European Integration, Ministry of Foreign Affairs of Ukraine 02.2005-12.2005 — First Deputy State Secretary, First Deputy Head, Secretariat of President of Ukraine 01.2006[1]–06.2010[2]— Ambassador Extraordinary and Plenipotentiary of Ukraine to the Republic of Poland 06.2010[3]-04.2015[4] — Ambassador Extraordinary and Plenipotentiary of Ukraine to the United States of America 11.2010-04.2015 — Ambassador Extraordinary and Plenipotentiary of Ukraine to Antigua and Barbuda with Residence in the U.S. 07.2011-04.2015 — Permanent Observer of Ukraine at the Organization of American States 09.2011-04.2015 — Ambassador Extraordinary and Plenipotentiary of Ukraine to the Republic of Trinidad and Tobago with Residence in the U.S. 1993 — Reporter of the Sixth Committee (Legal Committee), 48th Session of the U.N. General Assembly 1994-1995 — Vice-Chairperson of the U.N.

Ad Hoc Committee on the Elaboration of an International Convention Dealing with the Safety and Security of the United Nations and Associated Personnel 1995-2005 — Headed a number of Ukrainian delegations on bilateral and multilateral negotiations, and international forums.

2002-2005 — National Coordinator of Organization of the Black Sea Economic Cooperation (BSEC) 2004 — Agent of Ukraine before the International Court of Justice in the case concerning Maritime Delimitation in the Black Sea (Romania v. Ukraine) 2004-2005 — National Coordinator of GUAM (Regional economic organization of Georgia, Ukraine, Azerbaijan, and Moldova) Author of numerous essays and articles in the field of International Law and International Relations.

The main topics are: succession of States in respect of State property, archives and debts; the Maritime Law; BSEC; GUAM; bilateral Ukrainian-Turkish, Ukrainian-Polish and Ukrainian-American relations.