Thomas N. Theis is director of physical sciences with the IBM Thomas J. Watson Research Center. He received a B.S. in physics from Rensselaer Polytechnic Institute in 1972 and M.S. and Ph.D. degrees from Brown University in 1974 and 1978, respectively. A portion of his Ph.D. research was done at the Technical University of Munich, where he completed a postdoctoral year before joining IBM Research in 1979. Dr. Theis joined the department of semiconductor science and technology at the IBM Watson Research Center to model the electronic properties of two-dimensional systems. In 1993 he was named senior manager of silicon science and technology, where he was responsible for exploratory materials and process integration work bridging between research and the IBM microelectronics division. He assumed his current position as director of physical sciences in February 1998. Dr. Theis is a member of the Nanotechnology Technical Advisory Group of the President’s Council of Advisors on Science and Technology and serves on the National Advisory Board for the National Nanotechnology Infrastructure Network (NNIN). Dr. Theis also serves on the advisory board for the American Institute of Physics Corporate Associates. He is a member of the Physics Policy Committee of the American Physical Society and a member of the Board on Physics and Astronomy of the National Research Council. He is also a member of the IEEE and a fellow of the American Physical Society. He has authored or co-authored over 60 scientific and technical publications.