Robert C. O’Brien


Ambassador O’Brien served as the 27th National Security Adviser from 2019 to 2021. He previously served as the Special Envoy for Hostage Affairs and as a U.S. Representative to the UN General Assembly. Ambassador O’Brien had practiced law for 30 years in Los Angeles and has rejoined the firm he founded with Judge Stephen Larson, Larson LLP, as Of Counsel.