scholar in hydraulic engineering, was a long-time faculty member at Berkeley.
Steven Chu (PhD 1976), the 12th United States Secretary of Energy and Nobel laureate in physics, was director of Berkeley Lab from 2004 to 2009.
Janet Yellen, 78th United States Secretary of Treasury and the 15th Chair of the Federal Reserve, is a professor emeritus at Berkeley Haas School of Business and the Department of Economics.
=== Alumni ===
Alumni have included 260 American Academy of Arts and Sciences Fellows, 34 Pulitzer Prize winners, 25 living billionaire alumni, 22 cabinet members, 68 recipients of the National Medal of Science, 190 recipients of the MacArthur Fellowship, 144 members of the National Academy of Sciences, 139 Guggenheim Fellows, and 125 Sloan Fellows, and 75 members of the National Academy of Engineering.
==== Government ====
Berkeley alumni have served in a range of prominent government offices, both domestic and foreign, including Chief Justice of the United States Supreme Court (Earl Warren, BA, JD); …
