Mark Malloch Brown, Baron Malloch-Brown, English journalist and politician, 2nd Deputy Secretary-General of the United Nations

George Mark Malloch Brown, Baron Malloch-Brown is a British diplomat, communications consultant, journalist and former politician serving as president of Open Society Foundations since 2021, having previously served as Deputy Secretary-General of the United Nations under Kofi Annan from April to December 2006. A former member of the Labour Party, he served as Minister of State for Africa and the United Nations in the Brown government from 2007 to 2009.

The deputy secretary-general of the United Nations is the deputy to the secretary-general of the United Nations. The office was created to handle many of the administrative responsibilities of the secretary-general, help manage Secretariat operations, and ensure coherence of activities and programs. The post was formally established by the General Assembly at the end of 1997.