On July 1, 2006, Robert J. Zimmer became the 13th President of the University of Chicago. Prior to his appointment as President, Zimmer was a University of Chicago faculty member and administrator for more than two decades specializing in the mathematical fields of geometry, particularly ergodic theory, Lie groups, and differential geometry. As a University of Chicago administrator, Zimmer served as Chairman of the Mathematics Department, Deputy Provost, and Vice President for Research and for Argonne National Laboratory. He also served as Provost at Brown University from 2002-2006, returning to Chicago in 2006 to become President of the University. President Zimmer earned his A.B., summa cum laude, from Brandeis University in 1968 and a Ph.D. in mathematics from Harvard University in 1975. He joined the Chicago faculty as an L.E. Dickson Instructor of Mathematics in 1977. He was also on the faculty of the U.S. Naval Academy from 1975 to 1977. He has held visiting positions at Harvard University and at institutions in Israel, France, Australia, Switzerland, and Italy.