Director of Research, European Council on Foreign Relations (2015-).
Formerly: Fellow, Project on International Order and Strategy, and Foreign Policy Program, Center on the United States and Europe, Brookings Institution; Senior Adviser, Bureau of European and Eurasian Affairs, U.S. Department of State; Director of Research, Center on the United States and Europe, Brookings Institution; Non-Resident Senior Policy Fellow, European Council on Foreign Relations; Adjunct Professor, Security Studies Program, Georgetown University; Policy Analyst, RAND, Washington, DC.
A Governor (2016-), The Ditchley Foundation.