Janet Ann Napolitano (born November 29, 1957) is an American politician who is currently president of the University of California system. She became the first woman to serve as Secretary of Homeland Security on January 21, 2009. Before becoming Secretary of Homeland Security, she was the Governor of Arizona and Attorney General of Arizona. She announced her resignation of Homeland Security in July 2013 to become president of the University of California. She assumed presidency of the University of California on September 30, 2013, and is the first woman in the post.