I am currently the Phyllis A. Wallace Dean of Diversity and Faculty Development and Professor of Physics in the Faculty of Arts and Sciences at Yale University. I was formerly at the University of Pennsylvania serving as the Edmund J. and Louise W. Kahn Professor for Faculty Excellence in the Department of Physics and Astronomy. I received my PhD in experimental particle physics from Stanford University in 1985 and was, for the next 33 years, at Penn as a Research Investigator, Assistant, Associate, and Full Professor of Physics with a secondary appointment as Professor in the Higher Education division of Penn’s Graduate School of Education. I turned to experimental cosmology as a visiting scholar at the Lawrence Berkeley National Laboratory (LBNL) in 2003-4 working on the Supernova/Acceleration Probe where I led the ground-based simulation effort for mission planning. I have been connected to the Legacy Survey of Space and Time (LSST) since 2008.
While at Penn I had a number of administrative leadership roles including serving as Chair of the Faculty Senate, Chair of the Department of Physics and Astronomy and as the Associate Dean for Natural Sciences in the School of Arts and Sciences. For the American Physical Society (APS), I have served as chair of the APS Forum on Outreach and Engaging the Public, Chair of the APS Nominating Committee that chooses candidates for election to leadership of the APS, and a member of the APS Executive Board. I was also the Director and Principal Investigator of the Penn Science Teacher Institute so I have had strong interests in community outreach, undergraduate teaching and improving diversity and inclusion in physical sciences for more than 3 decades. My research interests have been mostly directed toward mission planning, particularly around use of Type Ia supernovae as standard candles for cosmological parameter measurements. Hence, I have been a member of the Dark Energy Science Collaboration and its Supernova Analysis Working Group since its inauguration at Penn in 2012. I have also held multiple leadership roles in the Large Synoptic Survey Telescope Corporation, a non-profit that supports the scientific mission of the Vera C. Rubin Observatory LSST mission.