Thomas Greminger
| Thomas Greminger | |
|---|---|
| Born | 22 April 1961 Lucerne, Switzerland | 
| Occupation | Diplomat | 
| Known for | Former Secretary-general for the Organization for Security and Co-operation in Europe (OSCE) | 
Thomas Greminger (born 22 April 1961 in Lucerne) is a Swiss diplomat. He served as Secretary-General for the Organization for Security and Co-operation in Europe (OSCE) from July 2017 to July 2020. Since May 2021, he has been the Director of the Geneva Centre for Security Policy (GCSP). He is a general staff officer in the Swiss army (lieutenant colonel).