Mark Trodden, Thomas S. Gates, Jr. Professor of Physics & Astronomy, began his tenure as Dean of the School of Arts & Sciences in June 2025. A faculty member since 2009, he previously co-directed the Center for Particle Cosmology, chaired the Department of Physics and Astronomy from 2014 to 2022, and served as Associate Dean for the Natural Sciences from 2023 to 2025.
A widely cited scholar in cosmology and particle physics, Trodden is a Fellow of the American Physical Society, the American Association for the Advancement of Science, and the United Kingdom’s Institute of Physics. His leadership has been shaped by service on national scientific advisory bodies and his mentorship of the next generation of scholars in the field. He was also an invaluable partner in the completion of the Vagelos Laboratory for Energy Science and Technology, while also engaging deeply with alumni, donors, and volunteer leaders across the School and University community.
Throughout his career at Penn, Trodden has demonstrated a deep appreciation for the full range of inquiry and scholarship within the School of Arts & Sciences. He has been a steadfast advocate for the humanities, a champion of interdisciplinary collaboration, and a trusted institutional voice in moments of both promise and complexity.
About the Donor
Thomas S. Gates, Jr., C’28, HON’56
This chair was established in honor of the late Thomas S. Gates, Jr., C'28, HON'56 in 1976.