Ramon Arrowsmith
Ramon Arrowsmith
Interim School Director
Ramon Arrowsmith studies active faults, topography, the geologic context for human evolution in East Africa, and the geology of earthquakes. He teaches Field Geology and Structural Geology. He is currently the School of Earth and Space Exploration Interim Director (as of August 1, 2025).
Sarah Stewart
Associate Director of Graduate Initiatives
Sarah Stewart is a planetary physicist who specializes in the study of collisions in the solar system. Her research encompasses the formation and destruction of planets, planetary geology, shock physics, and materials science.
Nathaniel Butler
Nathaniel Butler
Associate Director of Undergraduate Initiatives
Nat Butler is an astrophysicist interested in the properties and evolution of the early universe. His current research focuses on experiments to observe and study astrophysical explosions and to use these to probe the first stars and galaxies and their environments.
Maitrayee Bose
Maitrayee Bose
Associate Director of Community Outreach
Christy Till
Christy Till
Associate Director for an Inclusive Community
Christy Till is a geologist who leads a multidisciplinary research program that studies the role of magma in the formation and evolution of planets, known as the EPIC lab. Her research and that of EPIC lab members includes determining the timescales and triggers for eruptions at active volcanoes in the US, growing minerals and magma in high pressure and temperature laboratory experiments, and studying likely compositions of magma and crusts on exoplanets.