Question: who is the chief administrative officer of the un
Answer: Secretary - General of the United Nations Emblem of the United Nations Flag of the United Nations Incumbent António Guterres since 1 January 2017 ( 2017 - 01 - 01 ) United Nations Secretariat Style His Excellency Status Chief administrative officer Head of an organ Member of Secretariat General Assembly Residence United Nations Headquarters Seat New York City , New York , United States Nominator Security Council Appointer General Assembly Term length five years , renewable ( traditionally limited to two terms ) Constituting instrument United Nations Charter Inaugural holder Gladwyn Jebb as acting Secretary - General ( 24 October