Michael Angus O'Neill (born 1965) was a British diplomat. From 2014 until 2018, he was a United Nations Assistant Secretary-General and the Director of External Relations and Advocacy in the

United Nations Development Programme The United Nations Development Programme (UNDP) is a United Nations agency tasked with helping countries eliminate poverty and achieve sustainable economic growth and human development. The UNDP emphasizes on developing local capacity towar ...

(UNDP), appointed by

United Nations Secretary-General The secretary-general of the United Nations (UNSG or UNSECGEN) is the chief administrative officer of the United Nations and head of the United Nations Secretariat, one of the United Nations System#Six principal organs, six principal organs of ...

Ban Ki-moon Ban Ki-moon (born 13 June 1944) is a South Korean politician and diplomat who served as the eighth secretary-general of the United Nations between 2007 and 2016. Prior to his appointment as secretary-general, Ban was the South Korean minister ...

on 4 February 2014, replacing

Sigrid Kaag Sigrid Agnes Maria Kaag (; born 2 November 1961) is a Dutch politician, humanitarian and diplomat who is the UN Special Coordinator for the Middle East Peace Process since 2025 and the Senior Humanitarian and Reconstruction Coordinator for Ga ...

. Prior to this, he served as Head of Mission at the Helmand Provincial Reconstruction Team in Afghanistan and as the United Kingdom's Special Representative for Sudan. He has also held appointments at the UK Embassy in Washington and at the UK missions to the

United Nations The United Nations (UN) is the Earth, global intergovernmental organization established by the signing of the Charter of the United Nations, UN Charter on 26 June 1945 with the stated purpose of maintaining international peace and internationa ...

in New York and the

European Union The European Union (EU) is a supranational union, supranational political union, political and economic union of Member state of the European Union, member states that are Geography of the European Union, located primarily in Europe. The u ...

in Brussels, as well as in the Foreign and Commonwealth Office in London and the United Kingdom Delegation to the

North Atlantic Treaty Organization The North Atlantic Treaty Organization (NATO ; , OTAN), also called the North Atlantic Alliance, is an intergovernmental transnational military alliance of 32 member states—30 European and 2 North American. Established in the aftermat ...

(NATO) in Brussels. O'Neill holds a master's degree in Classics and Modern History from

Brasenose College Brasenose College (BNC) is one of the constituent colleges of the University of Oxford in the United Kingdom. It began as Brasenose Hall in the 13th century, before being founded as a college in 1509. The library and chapel were added in the m ...

Oxford University The University of Oxford is a collegiate research university in Oxford, England. There is evidence of teaching as early as 1096, making it the oldest university in the English-speaking world and the second-oldest continuously operating u ...

, and a master's degree in West European Politics from the

London School of Economics The London School of Economics and Political Science (LSE), established in 1895, is a public research university in London, England, and a member institution of the University of London. The school specialises in the social sciences. Founded ...

. He is married and has four children.

References

British officials of the United Nations Living people Ambassadors of the United Kingdom to Qatar Companions of the Order of St Michael and St George 1967 births {{UN-bio-stub