Currently: Principal Investigator of NASA's Astronomy Activation Ambassadors program. B.Sc. in physics from MIT, Ph.D. in astrophysics from the University of Hawai`i. Infrared astronomy post-doctoral researcher at Kitt Peak National Observatory in Tucson, Arizona and at NASA's Ames Research Center. Professor of physics and astronomy for 12 years at Franklin & Marshall College in Lancaster, Pennsylvania. Employed by the SETI Institute as director of education and public outreach for NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA) at NASA-Ames from 2003 to 2016. Has taught courses on introductory astronomy at Santa Clara University and on global climate change in Stanford University's Continuing Studies Program. Co-author with Michael Seeds and Eric Wegryn of three college introductory astronomy textbooks: "Horizons", “Foundations”, and “Astro”.