Guterres, 67, was a socialist Prime Minister of Portugal from 1995-2002 and the U.N. High Commissioner for Refugees from June 2005-December 2015.
He was appointed by the General Assembly on October 13. After months of competition with candidates from a variety of countries, the Security Council unanimously endorsed Guterres, recommending him to the General assembly for approval. He takes over from Ban Ki-moon on Jan. 1.
After being sworn in by General Assembly President Peter Thomson, Guterres addressed the 193 member nations, saying the world body must work to simplify, decentralize and make more flexible its sprawling bureaucracy.
The swearing-in came after the 193 General Assembly members paid tribute to Ban, ending with a standing ovation for the native South Korean.
(Excerpts from Fox News)