Janet Louise Yellen is an American economist who served as the 78th United States secretary of the treasury from 2021 to 2025 and as the 15th chair of the Federal Reserve from 2014 to 2018. She was the first woman to hold either position, and has also led the White House Council of Economic Advisers. Yellen is professor emeritus at the University of California, Berkeley, where she joined the faculty in 1980 and held the Eugene E. and Catherine M. Trefethen professorship in business administration and economics. Born: August 13, 1946 In office: February 3, 2014 – February 3, 2018 Wiki link