Stephen Mackwell, Ph.D.

American Institute of Physics, Deputy Executive Officer

Dr. Stephen Mackwell is the Deputy Executive Officer at the American Institute of Physics in College Park, Maryland. He received a B.Sc. in Physics and Mathematics and M.Sc. in Astrophysics from the University of Canterbury in New Zealand and Ph.D. in Geophysics from the Australian National University. He was a Postdoctoral Fellow in the Department of Materials Science and Engineering at Cornell University, then Professor in Geosciences at the Pennsylvania State University. In 1998, he moved to the Bayerisches Geoinstitut in Bayreuth, Germany, where he was Professor and Institute Director. Dr. Mackwell was USRA’s Director of the Lunar and Planetary Institute in Houston, Texas, from 2002 until 2016. From 2016 until 2019, he was the Corporate Director, Science Programs at USRA Headquarters in Columbia, MD. He is an Adjunct Professor in the Department of Earth Science at Rice University. Dr. Mackwell is an experimental geophysicist, studying the mechanical and chemical properties of planetary materials at high-temperatures and pressures. He has published more than 80 refereed papers in respected international journals. He serves on numerous panels and advisory groups for the National Academies, NASA and other federal agencies, as well as within the university community. He is a Fellow of the American Geophysical Union, the American Association for the Advancement of Science, and the Mineralogical Society of America. In 2016, Asteroid 5292 Mackwell (1991 AJ1) was named in honor of his contributions to planetary science.