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Ellen Stofan, PHD

Ellen Stofan served as NASA's Chief Scientist from 2013 to 2017. In that role, she was the principal advisor to NASA Administrator Charles Bolden on the agency's science programs and science-related strategic planning and investments.

Prior to her appointment, Ellen was Vice President of Proxemy Research and honorary professor in the department of Earth sciences at University College London in England. Her research has focused on the geology of Venus, Mars, Saturn's moon Titan, and Earth. Ellen is an associate member of the Cassini Mission to Saturn Radar Team and was a co-investigator on the Mars Express Mission's MARSIS sounder. She also was principal investigator on the Titan Mare Explorer, a proposed mission to send a floating lander to a sea on Titan. From 1991 through 2000, she held a number of senior scientist positions at NASA's Jet Propulsion Laboratory, including Chief Scientist for NASA's New Millennium Program, deputy project scientist for the Magellan Mission to Venus, and experiment scientist for SIR-C, an instrument that provided radar images of Earth on two shuttle flights in 1994.

Ellen holds Master and Doctorate degrees in geological sciences from Brown University and a Bachelor's degree from the College of William and Mary.