Having served in senior advisory positions in the U.S. government, Bart Szewczyk advises on European and global public policy, particularly on technology, economic sanctions and asset seizure, trade and foreign investment, business and human rights, and environmental, social, and governance issues, as well as conducts international arbitration. He also teaches grand strategy as an Adjunct Professor at Sciences Po in Paris and is a Nonresident Senior Fellow at the German Marshall Fund.

Bart recently worked as Advisor on Global Affairs at the European Commission's think-tank, where he covered a wide range of foreign policy issues, including international order, defense, geoeconomics, transatlantic relations, Russia and Eastern Europe, Middle East and North Africa, and China and Asia. Previously, between 2014 and 2017, he served as Member of Secretary John Kerry’s Policy Planning Staff at the U.S. Department of State, where he covered Europe, Eurasia, and global economic affairs. From 2016 to 2017, he also concurrently served as Senior Policy Advisor to the U.S. Ambassador to the United Nations, Samantha Power, where he worked on refugee policy. He joined the U.S. government from teaching at Columbia Law School, as one of two academics selected nationwide for the Council on Foreign Relations International Affairs Fellowship. He has also consulted for the World Bank and Rasmussen Global.

Prior to government, Bart was an Associate Research Scholar and Lecturer-in-Law at Columbia Law School, where he worked on international law and U.S. foreign relations law. Before academia, he taught international law and international organizations at George Washington University Law School, and served as a visiting fellow at the EU Institute for Security Studies. He also clerked at the International Court of Justice for Judges Peter Tomka and Christopher Greenwood and at the U.S. Court of Appeals for the Third Circuit for the late Judge Leonard Garth.

Bart holds a Ph.D. from Cambridge University where he studied as a Gates Scholar, a J.D. from Yale Law School, an M.P.A. from Princeton University, and a B.S. in economics (summa cum laude) from The Wharton School at the University of Pennsylvania. He has published in Foreign Affairs, Foreign Policy, Harvard International Law Journal, Columbia Journal of European Law, American Journal of International Law, George Washington Law Review, Survival, and elsewhere. He is the author of three books: Europe’s Grand Strategy: Navigating a New World Order (Palgrave Macmillan 2021); with David McKean, Partners of First Resort: America, Europe, and the Future of the West (Brookings Institution Press 2021); and European Sovereignty, Legitimacy, and Power (Routledge 2021).