Timo S. Koster is a career Diplomat at the Dutch Ministry of Foreign Affairs and Ambassadorial Fellow with the Atlantic Council’s Scowcroft Center for Strategy and Security. From 2012 to 2018, he was Director for Defense Policy and Capabilities at NATO headquarters in Brussels. He has served in several positions within the Ministry, including a stint as private secretary to the Minister for European Affairs. From 1998 to 2001 he served at the Netherlands Embassy in London as Head of the Economic Department. In 2001, Koster became Acting Director for European integration at the Ministry of Economic Affairs. He was Deputy Ambassador at the Royal Netherlands Embassy in Athens, Greece. He also served as Defense Advisor at the Netherlands Permanent Representation to NATO.