Professor of Materials Science, University of California, Berkeley, 1991- Assistant, Associate Professor of Materials Science, University of California, Berkeley, 1983-91 Faculty Investigator, Center for Advanced Materials, Lawrence Berkeley Laboratory 1987- Member of Technical Staff (part-time), Hewlett Packard Laboratories, 1983-87 Research Associate, University of Lund (Sweden), 1982-83 Scientific Assistant, University of Cologne, West-Germany, 1976-82 Scientific Assistant, RWTH Aachen, West-Germany, 1973-76