Dr. Deni analyzes, researches, and writes about national security; he builds, leads, and manages collaborative multinational project teams; he solves problems for customers and stakeholders; he provides critical analysis; he publishes reports, studies, essays, op-eds, articles, chapters, and books; and he regularly engages the public and media. He has advised senior civilian and military leaders. His expertise spans NATO and other U.S. alliances; national security strategy and defense policy; the U.S. role in European and Eurasian security; American force posture overseas; political bargaining at the national and international levels; and the role of Congress in U.S. foreign policy-making.