Ambassador Thomas Greminger is the Director of the Geneva Center for Security Policy since 1 May 2021. 

Previously, he served as Secretary General of the Organization for Security and Co-operation in Europe from July 2017 until July 2020. 

Ambassador Greminger served as Deputy Director General of the Swiss Agency for Development and Cooperation at the Federal Department of Foreign Affairs from 2015 to 2017 and as the Permanent Representative of Switzerland to the OSCE, the United Nations and the International Organizations in Vienna from 2010 to 2015. 

From 2004 to 2010, he served as Head of the Human Security Division of the Federal Department of Foreign Affairs. Ambassador Greminger also served as Deputy Head of the Human Security Division and as Country Director at the Swiss Embassy in Maputo, Mozambique. From 1994 to 1998, he served in different posts in the Swiss Agency for Development and Cooperation, including Head of the Policy and Research Unit.