Robert C. O'Brien

Robert C. O'Brien is an American diplomat and lawyer who served as the U.S. National Security Advisor from 2019 to 2021 under President Donald Trump. In this role, he was a top advisor on national security issues, working closely with the President and other agencies to develop and implement U.S. foreign policy and security strategies. Before this, O'Brien held various diplomatic positions, including U.S. envoy to the United Nations. He has a background in law and international affairs, emphasizing diplomacy and policy analysis to address global challenges.