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
Senior Research Scientist - University of Texas at Austin
Former Director for Solar System Exploration - Jet Propulsion Laboratory
Project Manager - Jet Propulsion Laboratory
Project Manager - Marshall Space Flight Center
Engineering Camera Payload Uplink Lead
Chief Astronomer and NASA Solar System Ambassador - The Franklin Institute Science Museum
