Sonja Köppel is the Secretary of the Water Convention.

Sonja Koeppel leads the water team at the United Nations Economic Commission for Europe and serves as secretary to the Convention on the Protection and Use of Transboundary Watercourses and International Lakes (Water Convention) and co-secretary to the UNECE/ WHO-Europe Protocol on Water and Health. She has worked for more than 10 years in the secretariat, for example coordinating the activities on climate change adaptation. Before joining UNECE, she worked for UNEP in Nairobi and studied in Budapest, Stuttgart, Bordeaux and Manchester.