President-elect Joe Biden announced several individuals that he plans to nominate for high-ranking economic positions yesterday, including Janet Yellen as Treasury Secretary. Yellen served as Chair of the Federal Reserve under the Obama and Trump administrations from 2014 to 2018. If confirmed, she would become the first woman to lead the Treasury Department in its 231-year history and the first person to have served as Treasury Secretary, Chair of the Council of Economic Advisors, and Chair of the Federal Reserve.
More context: The announcement marks the third major release of potential nominees and appointees by the Biden transition team, following earlier announcements covering national security and communications. See a full list.