The following excerpt is now (circa 2020) defunct, deleted from the princeton.edu website.
Professor Jahn is Dean Emeritus of the School of Engineering and Applied Science at Princeton University. He is a Fellow of the American Physical Society and of the American Institute of Aeronautics and Astronautics, and has been chairman of the AIAA Electric Propulsion Technical Committee, associate editor of the AIAA Journal, and a member of the NASA Space Science and Technology Advisory Committee.
He is vice President of the Society for Scientific Exploration and Chairman of the Board of the International Consciousness Research Laboratories consortium. He has been a long-term member of the Board of Directors of Hercules, Inc. and chairman of its Technology Committee, and a member and chairman of the Board of Trustees of Associated Universities, Inc.