
Thomas Shannon
Arnold & Porter Senior International Policy Advisor
Ambassador Thomas A. Shannon, Jr.
Senior International Policy Advisor at Arnold & Porter, and former Under Secretary of State
Ambassador Shannon is a Senior International Policy Advisor with the law firm Arnold & Porter and co-chair of its Global Law and Public Policy practice. He is also co-chair of the board of the Inter-American Dialogue. He serves concurrently at Princeton University as the Co-Director of the Program in the History and Practice of Diplomacy and as a Visiting Professor. An American diplomat for 35 years, he holds the personal rank of Career Ambassador. Most recently, Shannonserved as Under Secretary of State for Political Affairs (2016-2018), Counselor of the Department (2013-2015), and United States Ambassador to Brazil (2010-2013).
Senior International Policy Advisor at Arnold & Porter, and former Under Secretary of State
Ambassador Shannon is a Senior International Policy Advisor with the law firm Arnold & Porter and co-chair of its Global Law and Public Policy practice. He is also co-chair of the board of the Inter-American Dialogue. He serves concurrently at Princeton University as the Co-Director of the Program in the History and Practice of Diplomacy and as a Visiting Professor. An American diplomat for 35 years, he holds the personal rank of Career Ambassador. Most recently, Shannonserved as Under Secretary of State for Political Affairs (2016-2018), Counselor of the Department (2013-2015), and United States Ambassador to Brazil (2010-2013).