Margaret Judith Ann Peterlin (born October 9, 1970) is an American lawyer, United States Navy veteran, and former Commerce Department and congressional aide.
She was the Chief of Staff to the United States Secretary of State, appointed to the position by former Secretary of State Rex Tillerson, from February 2017 until the end of March 2018.
Since July 6, 2018, she has served as the senior vice president of global external and public affairs for AT&T.