Staff Scientist, Southwest Research Institute

Space Scientist & Explorer, ILEWG director, Prof VUA/Leiden/ISU/ISAE/EPFL, IAF/IAA

Emeritus Professor

Senior scientist, Space Research Institute

University of Tokyo, Planetary Science Institute

Science and Technology Corporation

Independent Researcher - JPL Retired

Professor, Scripps Institution of Oceanography

Professor of Planetary Science and Exploration, The Open University

University of Münster