He is Co-Chairman of the Energy and Space Tracks at Singularity University.
He previously served as Vice President of the St. Louis Science Center, Director of the McDonnell Planetarium, Senior Scientist of the Futron Corporation and CEO of the Space Studies Institute of Princeton.
He has served on many boards including the International Space University, the SUNSAT Energy Council, the Chicago Society for Space Studies, the Director’s Council of the Scripps Institution of Oceanography and the Charles and Anne Morrow Lindbergh Foundation where he is currently Vice Chairman.
An Associate Fellow of the American Institute of Aeronautics and Astronautics he has lectured throughout the Americas, Europe and Asia on spaceflight and energy. He received Russia’s Tsiolkovsky Medal for his work on space resources and the Space Frontier Foundation’s Vision to Reality award for creating the Lunar Prospector Team which ultimately found water at the moon’s poles.