
Scientist – NASA Jet Propulsion Laboratory

Co-Investigator for the New Horizons Mission – Boulder

Senior Research Scientist – University of Texas at Austin

Program Executive (Retired) – NASA Headquarters

Former Director for Solar System Exploration – Jet Propulsion Laboratory

Project Manager – Jet Propulsion Laboratory

Project Manager – Marshall Space Flight Center

Chief Astronomer and NASA Solar System Ambassador – The Franklin Institute Science Museum

Engineering Camera Payload Uplink Lead

Teacher/Observatory Coordinator – Minn.