Jacob Joseph "Jack" Lew (born August 29, 1955) is an American government administrator and attorney who is the 76th and current United States Secretary of the Treasury, serving since 2013. He served as the 25th White House Chief of Staff from 2012 to 2013. Lew previously served as Director of the Office of Management and Budget in the Clinton and Obama Administrations, and is a member of the Democratic Party.