Panel

Who will be the next UN Secretary-General? Rafael Mariano Grossi and Rebeca Grynspan each present their vision

Two of the candidates to be the next United Nations Secretary-General come to Chatham House to discuss how they might lead the organization, and what the role will require during a period of geopolitical turmoil.

Event date and time: 29 May 2026 — 11:00 TO 13:00 BST

Event location: Hybrid — Chatham House and Online

This event is now closed for in-person registrations. Virtual registration remains open.

The race to lead the United Nations is well under way. As member states weigh their options, Chatham House is inviting candidates to set out their vision for the role, and for the organization as a whole. At this event, two of the candidates will be presenting their vision, in sequence, each offering their own perspective.

The United Nations faces a moment of profound institutional pressure. Uncertain great-power support for multilateralism, a deepening financial crisis caused by member states not paying their fees, and persistent concern about the uneven application of the rules the organization exists to uphold have shaken confidence in the UN at precisely the moment that global challenges demand more of it. The incoming Secretary-General will inherit an organization mid-reform, with hard questions still unresolved about funding, authority and accountability. They will need to make their own imprint on the organization while navigating those pressures.

Part I: Rafael Mariano Grossi, Director-General, IAEA
As Director-General of the International Atomic Energy Agency, Rafael Mariano Grossi has spent years navigating some of the most consequential and contested questions in multilateral diplomacy – from nuclear non-proliferation to the safety of conflict-threatened nuclear infrastructure. He will draw on that experience to set out his vision for the Secretary-General’s role and his priorities for the United Nations.

Time: 11:00 – 11:45 BST

Part II: Rebeca Grynspan, Secretary-General, UNCTAD
As Secretary-General of UN Trade and Development and former Vice-President of Costa Rica, Rebeca Grynspan has strongly advocated for equitable development and the interests of the world’s most vulnerable economies. She will draw on that experience to set out her vision for the Secretary-General’s role and her priorities for the United Nations.

Time: 12:15 – 13:00 BST

Key questions:
•    What will define success for the next Secretary-General?
•    How can a Secretary-General exercise leadership when the great powers are divided and multilateral institutions face diminished support?
•    What proposals do they have for tackling the organization’s financial crisis?
•    What is each candidate’s vision for restoring trust in the UN’s rules-based framework – and for addressing perceptions of selective accountability?
•    How should existing reform processes be continued, accelerated, or reconceived?
•    What role can specialized agencies play in demonstrating the relevance and effectiveness of the multilateral system? Where are the gaps?

Refreshments will be provided for delegates in between each session.

Please note: Chatham House has invited all officially nominated candidates. You can find all candidates CVs, vision statements and financing disclosures on the UN website.

Event format and who can attend

Panel sessions bring together several renowned speakers with different perspectives on an issue, offering the audience a thought-provoking discussion that thoroughly analyses a topic from many angles. They are held in our Joseph Gaggero Hall and on the record. 

Members and guests get priority access, with places available to those who register their interest. 

By registering for this event, attendees agree to our code of conduct, ensuring a respectful, inclusive, and welcoming space for diverse perspectives and debate.

Become an individual member

Individual membership provides you with the complete Chatham House experience, connecting you with a unique global policy community.

A member takes the opportunity to ask the panel a question at our event on the digital revolution.
Auto insert on standard events