Robert O'Brien

Robert C. O'Brien is an American attorney and former government official who served as the United States National Security Advisor from 2019 to 2021 under President Donald Trump.13 Here are some key details about his career:

Legal Career

O'Brien was the California managing partner of the law firm Arent Fox LLP for seven years.12 He specialized in international arbitration and litigation.4 In 2016, O'Brien left Arent Fox to co-found Larson O'Brien LLP, a boutique law firm in Los Angeles.15

Government Service

• Served as the 27th U.S. National Security Advisor from 2019 to 202113
• Special Presidential Envoy for Hostage Affairs from 2018 to 201913
• Co-chairman of the U.S. Department of State Public-Private Partnership for Justice Reform in Afghanistan under Secretaries of State Rice and Clinton4

Other Roles

• Currently chairman of American Global Strategies, an international consulting and advisory firm14
• Elected chairman of the board of directors of the Richard Nixon Foundation in 20224
• Major in the Judge Advocate General's Corps of the United States Army Reserve1

O'Brien is known for his work in reducing the size of the National Security Council staff during his tenure as National Security Advisor.2 He has been described as avoiding publicity and aligning closely with President Trump's policy decisions.2