Director of the Electronics Engineering Division in the Accelerator Directorate at the SLAC National Acceletator Laboratory.

Associate Professor of Egyptology in the Department of Near Eastern Studies at the University of California, Berkeley and Associate Faculty Curator of Egyptology at the Phoebe A. Hearst Museum of Anthropology of the University of California.

Faculty member in the History of Art Department and the Ancient History and Mediterranean Archaeology Program at UC Berkeley. Founder of the Mario Del Chiaro Center for Ancient Italian Studies and elected member of the Instituto di Studi Etruschi ed Italici in Florence.

Director of Innovation at the School of Engineering at the University of California, Merced.

Member of the National Academy of Sciences and a Distinguished Professor of Physics, Emeritus, at UCLA, currently working at SLAC. Mostly known for pioneering work on X-ray free electron lasers and collective effects in relativistic particle beams.

Professor in the Economics Department at Stanford University and the “Ralph Landau” Senior Fellow at the Stanford Institute for Economic Policy Research. Also affiliated with NBER, CEPR, IZA, and a Fellow of the Econometric Society.