Brian Katulis is a senior fellow at the Center for American Progress, where his work focuses on U.S. national security. His past experience includes work at the National Security Council and the departments of State and Defense under the Bill Clinton administration. He also worked for Greenberg Quinlan Rosner Research, the National Democratic Institute for International Affairs, Freedom House, and former Pennsylvania Gov. Robert Casey. He is the co-author of The Prosperity Agenda, a book on U.S. national security.