Dr. Li Zhang is the manager of the System Analysis and Optimization group at IBM T.J. Watson Research Center. His research interests include control and performance analysis of computer systems, statistical techniques for traffic modeling and prediction, scheduling and resource allocation in parallel and distributed systems. He has also been working on measurement based clock synchronization algorithms. He received IBM's Outstanding Technical Achievement Award and Research Division Award for his work in performance modeling and optimization for computer systems. He further received IBM's prestigious Corporate Award and Outstanding Technical Achievement Award for developing advanced clock synchronization mechanisms for mainframe computers. A math major at Beijing University, he received his M.S. in Mathematics from Purdue University and his Ph.D. in Operations Research from Columbia University.