UN Secretariat
Supports the other UN bodies administratively (for example, in the organization of conferences, the writing of reports and studies and the preparation of the budget);
Its chairperson—the UN Secretary-General—is elected by the General Assembly for a five-year mandate and is the UN's foremost representative.
The UN Secretariat carries out the day-to-day duties required to operate and maintain the UN system. It is composed of tens of thousands of international civil servants worldwide and headed by the secretary-general, who is assisted by the deputy secretary-general.
The Secretariat's duties include providing information and facilities needed by UN bodies for their meetings and carrying out tasks as directed by the Security Council, the General Assembly, the Economic and Social Council, and other UN bodies.
The secretary-general acts as the spokesperson and leader of the UN. The position is defined in the UN Charter as the organization's chief administrative officer.
Article 99 of the charter states that the secretary-general can bring to the Security Council's attention "any matter which in their opinion may threaten the maintenance of international peace and security", a phrase that secretaries-general since Trygve Lie have interpreted as giving the position broad scope for action on the world stage.
The office has evolved into a dual role of an administrator of the UN organization and a diplomat and mediator addressing disputes between member states and finding consensus to global issues.
The secretary-general is appointed by the General Assembly, after being recommended by the Security Council, where the permanent members have veto power.
There are no specific criteria for the post, but over the years it has become accepted that the position shall be held for one or two terms of five years.
The current secretary-general is António Guterres of Portugal, who replaced Ban Ki-moon in 2017.
Trygve Lie
1st Secretary-General of the United Nations
Ban Ki-moon
8th Secretary-General of the United Nations
António Guterres
9th and Current Secretary-General of the United Nations
Secretaries-general of the United Nations