秘书长由世界气象大会任命，为期四年，最长任职期限八年。秘书长负责秘书处整体的技术和行政工作。他通过向副秘书长和助理秘书长授予实质性权力行使管理职责。根据大会制定的规则并经理事会批准，秘书长负责所有秘书处工作人员的任命，包括副秘书长和助理秘书长。
执行办公室由秘书长、副秘书长和助理秘书长组成。
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秘书处
秘书处
秘书处总部位于日内瓦，受秘书长领导。执行办公室由秘书长、副秘书长和助理秘书长组成。目前有八个职能司向执行办公室汇报：管理与对外关系、气候与水、语言会议与出版服务、发展与区域活动、观测与信息系统、研究、资源管理、以及天气与灾害风险。
秘书长
佩特里·塔拉斯教授
佩特里·塔拉斯教授自2016年1月1日起担任WMO 秘书长。他于2015年世界气象大会上获得任命，为期四年。目前是他的第二个四年任期（2020年1月至2023年12月）。
副秘书长
艾琳娜·玛娜妍科娃博士
艾琳娜·玛娜妍科娃博士自2016年起担任副秘书长。获得任命之前，她从2010年起担任WMO助理秘书长。在此之前，她自2006年开始担任秘书长事务和对外关系办公室主任。
Director, Cabinet Office of the Secretary-General
Paul Egerton, PhD
Dr Paul Egerton is the Director of the Cabinet Office of the Secretary-General, which includes Executive Management; Strategic Communications, External Relations, Protocol; Monitoring Evaluation, Risk Performance Unit; Controller's Office; UN Affairs Office and EU Affairs Office. The Head of the Secretariat of the Climate Risk Early Warning Systems (CREWS) Initiative also reports to the Director of the Cabinet.
Director, Governance Services
Maja Carrieri
Maja Carrieri (née Drazenovic) is the Director of Governance Services, a department which includes the Linguistic Services and Publishing Branch, the Conference Unit, Building Services and Management Unit and Administrative Services.
Director, Science & Innovation, and WMO Chief Scientist
Jürg Luterbacher, Professor
Professor Jürg Luterbacher has been the Director of Science and Innovation since January 2020 and the WMO Chief Scientist since May 2020.
Director, Member Services & Development
Filipe Lúcio
Filipe Domingis Freires Lúcio brings more than 25 of experience in senior leadership positions at national and international levels in the areas of operational meteorology, research, international cooperation and resources mobilization to the WMO Member Services and Development department.
Director, Infrastructure
Anthony Rea, PhD
Dr Anthony Rea has been the Director of Infrastructure since November 2019. A strong leader with a management background, he brings decades of experience in observations and data and in fostering collaboration at the international and national level to WMO.
Director, Services
Johan Stander, PhD
Dr Johan Stander was born in Port Elizabeth, South Africa. He studied meteorology, then obtained a PhD in oceanography. Dr Stander worked for the South African Weather Service before joining WMO. He often speaks about the great opportunities his country provided him first as a forecaster from 1989 then promoting him to positions of greater prominence that permitted him to gain extensive national and international experience.
