The Secretary General selection process: Evolution and interesting facts

By Javier Surasky


In 2026, the United Nations will select a new Secretary-General (SG) amid a conflictive environment marked by geopolitical tensions and both situational and structural crises within the organization itself.

As the selection process approaches, its presence is increasingly felt in political, academic, and even some media debates. But how is the Secretary-General chosen at the UN?

The answer is full of gaps. To begin with, there is no formally established process that lays out specific timelines or procedural steps to follow, and the debate around some of the existing informal guidelines is reopened with each selection.

In the early years of the UN’s existence, the selection of the SG was an opaque process. The Charter of the Organization does not specify it, limiting itself to stating that the General Assembly shall appoint the SG upon the recommendation of the Security Council. This means that the veto power of the five permanent members is built into the process, allowing any of them to block a candidate without offering any explanation.

As a first consequence, the SG selection process is dominated by negotiations among the great powers, with debates often taking place far from public scrutiny, behind closed doors. The level of secrecy was such that Kurt Waldheim, chosen in 1971, found out about his selection by the Security Council when it was publicly announced—he was unaware that he had even been considered for the post.

A second element: we speak of a “selection” and not an “election” because the Security Council (SC) proposes only one name to the General Assembly (GA), which can either accept or reject it—though rejection has never happened. It was the GA itself that requested, during its first session, that the SC submit only a single name (Resolution 11(I) of 1946). A significant development occurred in 1981 with the introduction of so-called “straw polls,” in which each member of the SC indicates their support, neutrality, or opposition to a candidate through an informal process that does not require official SC meetings. Although the identity of each voting country remains unknown (the procedure is secret), since 1991, colored ballots are used: red for the five permanent members (with veto power) and white for the non-permanent ones. This process quickly “filters out” candidates with real prospects, and results are often leaked to the public.

A third element: while it is said that SG serves for five years with the possibility of reelection, this is not a written rule. It is the SC that proposes the length of the mandate, and the GA that accepts it. In special circumstances, exceptions have occurred: Trygve Lie was appointed in 1946 directly by the GA for a second three-year term, later extended, after the SC was unable to agree on a candidate due to cross-vetoes. To date, all SGs have been reelected except for Dag Hammarskjöld (who died in office) and Boutros Boutros-Ghali, the first SG elected after the Cold War, who was vetoed by the United States in the SC despite the support of the other 14 members for his renewal.

Fourth: there is no formal rule, nor a firmly established practice, requiring regional rotation for the position. Western Europe has had four SGs, Asia and Africa each have two, Latin America and the Caribbean have one, and Eastern Europe has none. However, it has become a constant that none of the SGs are nationals of any of the five permanent members of the SC (the P5).

Finally, there is no “job description” against which to evaluate candidates’ qualifications. The role and functions of each SG have evolved in response to both the political space available during their mandate and their individual capabilities, courage, and personality. So far, all SGs have held high-level political positions in their countries, except for Kofi Annan, who had a long career within the UN. For context: the youngest SG at the time of appointment was Dag Hammarskjöld (age 48) and the oldest was Boutros Boutros-Ghali (age 70). The average age of the selected SGs is 58 years; however, considering only those chosen after the Cold War (four SGs), the average age increases to 65.

As early as 1996, the first serious attempt to regulate the process was made (the “Wisnumurti Guidelines”), sparking a new debate in 2006 with Canada’s submission of a non-paper on the issue.

In 2015–2016 a reform was implemented to make the SG selection process more transparent and democratic. Backed by a group of States and civil society actors under the “1 for 7 Billion” campaign (now “1 for 8 Billion”), the GA adopted Resolution 69/321. It established public calls for candidates via a joint letter from the presidents of the SC and GA, public disclosure of candidates’ names, CVs, and “vision statements,” and informal dialogues between candidates and Member States. The resolution also encouraged the nomination of female candidates, acknowledging that the UN has never had a woman SG.

This process was first applied in the 2016 selection, which included 13 official candidates (seven of them women). It resulted in the appointment of António Guterres—the first SG born after the founding of the UN, who was reelected in 2021. Although there were no other contenders, the GA insisted on applying the 2016 process: Guterres submitted a new vision statement and participated in an interactive dialogue with GA members in May 2021.

The same rules will apply for the next SG selection, which is once again expected to result in the appointment of a woman. Regional expectations also suggest the possibility of a candidate from Latin America and the Caribbean, though neither of these outcomes should be taken for granted. By the end of 2025, a joint letter from the SC and GA presidents is expected to launch the call for candidates, likely before the end of October. In the first half of 2026, the GA will organize informal hearings, after which the SC will make its recommendation for formal adoption by the GA. The chosen candidate will assume office on January 1, 2027, presumably following the standard five-year renewable term.

For now, all we can do is follow developments in real time to discover who will hold the post in the years to come. We’ll know soon, and the name chosen may reveal much about the organization's future.