WMO Secretariat reorganization
In August 2025, the Secretary-General approved a comprehensive reorganization of the WMO Secretariat, marking a decisive step toward a unified “One WMO” approach. This transformation responds to evolving global challenges, the need for more integrated Earth system services, and increasing financial constraints.
The reorganization strengthens WMO’s institutional resilience, optimizes resources, and aligns Secretariat structures more closely with Members’ priorities.
Download the reorganization plan in your preferred language:
Organigrams of the new Secretariat structure
To reflect the new structure, WMO has updated its organizational charts.
General Secretariat
Overview of the new Secretariat structure, including the Office of the Secretary-General, Deputy Secretary-General and Assistant Secretary-General.
Office of the Secretary-General
Detailed chart of the Office of the Secretary-General, including oversight, legal, governing bodies, regional coordination and regional offices.
Office of the Deputy Secretary-General
Detailed chart of the Deputy Secretary-General’s departments and divisions, including Earth Systems Data and Predictions, Science, Services and Capacity Development, and the IPCC Secretariat.
Office of the Assistant Secretary-General
Detailed chart of the Assistant Secretary-General’s divisions and offices, including Development Partnerships, Controller and Management Services, Human Resources and Corporate Services, and specialized offices.