Ambassador Sauer began his diplomatic career with the
Finnish Foreign Ministry in 1995 working as a Desk Officer for Germany, Austria, Switzerland, United States and Canada in the Political Department. In 1997, Sauer transferred to the Economic Department to work as a Desk Officer for Cooperation with Adjacent Areas. In 1998, he worked for the Department for Press and Culture as the Desk Officer for Cultural Cooperation. 1998–2000 Sauer served as the Deputy Head of the Embassy of Finland in
Zagreb, Croatia. 2000–2003 Sauer worked as the First Secretary of the Permanent Mission of Finland to the United Nations. 2003–2004 Sauer served as a Senior Adviser to the Special Representative of the Secretary General, Mr.
Harri Holkeri in the
United Nations Interim Administration Mission in Kosovo (UNMIK). 2004–2005 Sauer worked as the Head of the Strategic Analysis and Research Unit in UNMIK. In 2005, Sauer was appointed as the Director of the Unit for the Western Balkans, in the Ministry for Foreign Affairs of Finland. 2005–2007 Sauer worked as a Senior Adviser to the Special Representative of the UN Secretary General, former President of the Republic of Finland,
Martti Ahtisaari who led the
UN-facilitated Kosovo future status process and the UN Office of the Special Envoy for Kosovo (UNOSEK) in Vienna, Austria. 2007–2010 Sauer worked as the Director of the Unit for UN Affairs in the Ministry for Foreign Affairs. In 2010 Sauer was appointed as the Ambassador of Finland to Indonesia, Timor-Leste and
ASEAN (Association of Southeast Asian Nations). 2014–2019, Sauer served as the
Permanent Representative of Finland to the United Nations. 2019-2023, Sauer served four years as the Under Secretary of State for Foreign and Security Policy at the Ministry for Foreign Affairs of Finland. On the 27th of September 2023, Mr. Sauer took up his position as the Ambassador of the Embassy of Finland to Germany. == Personal life ==