Alex Tiersky, Senior Policy Advisor


Alex Tiersky was appointed as the Commission’s Global Security and Political-Military Affairs Advisor in May 2016.  In that capacity, he has responsibility for a broad portfolio of “first dimension” issues throughout the OSCE space and beyond. He also covers Ukraine.

Alex comes to the Commission from his role as Specialist in Foreign Affairs at the Congressional Research Service, where he served as an expert adviser to Members of Congress, leadership, and professional congressional committee staff on national security and foreign policy legislation, policy, and oversight activities, with a focus on Department of State management and global affairs.  Previously, Alex served as Director of the Defense and Security Committee of the NATO Parliamentary Assembly.  Based in Brussels, Alex worked with legislators from dozens of countries to influence security policy across the Alliance.  

From 2004 to 2007, Alex served as Foreign Affairs Officer and Presidential Management Fellow at the U.S. Department of State.  He held various positions with responsibility for U.S.-Russian strategic nuclear issues, conventional arms control and other political-military affairs in Europe, as well as at NATO headquarters in Brussels and on Capitol Hill.  Alex has also worked as a researcher at the Council on Foreign Relations and as the Assistant Director for the Global Reporting Network at New York University’s Center for War, Peace, and the News Media. 

Alex holds an M.A. from the School of Advanced International Studies (SAIS) at Johns Hopkins (2004). He also holds degrees from the Institut d’Etudes Politiques (Sciences Po) (1998), and Tufts University (1997).  He is fluent in French.