Director - Solar System Exploration Research Virtual Institute
Lunar Geologist - Lunar and Planetary Institute
Evan Pugh Professor of Geosciences - Penn State University
Astrobiologist
Chief Scientist - NASA George C. Marshall Space Flight Center
Planetary Geophysicist - NASA's Jet Propulsion Laboratory (JPL)
Co-Investigator for the New Horizons Mission - Boulder
Scientist - NASA Jet Propulsion Laboratory
Program Executive (Retired) - NASA Headquarters
