Persis Drell

Persis Sydney Drell (born 1955) is an American physicist who is the provost emerita and the James and Anna Marie Spilker Professor in the Stanford University School of Engineering, where she is also a professor of materials science and engineering, and a professor of physics. Prior to her appointment as provost, she was dean of the Stanford School of Engineering from 2014 to 2017 and director of the US Department of Energy’s SLAC National Acceleratory Laboratory from 2007 to 2012. In 2025, she was elected to the American Philosophical Society.

Early life and education Drell was born in 1955 in Boston, Massachusetts. The daughter of noted physicist Sidney Drell, Persis moved to Stanford when she was six months old. She earned her bachelor's degree in mathematics and physics in 1977 from Wellesley College. She credits her physics professor, Phyllis Fleming, with her personal interest in the field, and at her encouragement, took several advanced physics courses at the Massachusetts Institute of Technology.

In 1988, Drell was appointed to the physics faculty at Cornell University and joined the CLEO collaboration working on heavy flavor physics. During her tenure, she was the deputy director of Cornell's Laboratory of Nuclear Studies and served as chair of the Synchrotron Radiation Committee.

In 2002, Drell joined the faculty at Stanford and was appointed associate director, particle and particle astrophysics (then known as research division) at the SLAC National Accelerator Laboratory (then known as the Stanford Linear Accelerator Center), where she oversaw the BaBar experiment.

Drell was a member of Nvidia's board of directors for more than ten years, resigning in 2026.

Recognition Drell is a member of the National Academy of Sciences, the American Academy of Arts and Sciences, the German National Academy of Sciences Leopoldina, and a fellow of the American Physical Society and a fellow of the American Association for the Advancement of Science (AAAS). She has been the recipient of a Guggenheim Fellowship and a National Science Foundation Presidential Young Investigator Award.

Personal life Drell is married to accelerator physicist Jim Welch. They met in a chamber group at Cornell University. The couple has three children.