Cheryl D. Mills (born 1965) is an American lawyer and corporate executive. She first came into public prominence while serving as deputy White House Counsel for President Bill Clinton, whom she defended during his 1999 impeachment trial. She has worked for New York University as Senior Vice President, served as Senior Adviser and Counsel for Hillary Clinton's 2008 presidential campaign, and is considered a member of Hillary Clinton's group of core advisers, self-designated as "Hillaryland". She served as counselor and chief of staff to Hillary Clinton during her whole tenure as United States Secretary of State. After leaving the State Department in January, 2013, she founded BlackIvy Group, which builds businesses in Africa.
On September 3, 2015, she testified before the House Select Committee on Benghazi regarding her and former Secretary Clinton's actions and role during the 2012 Benghazi attack, although the fact that she no longer held a security clearance may have limited the scope of the committee's questioning.
