William Welsh, Ph.D., is a professor of astronomy at San Diego State University. He earned his Ph.D. from the Ohio State University, followed by postdoctoral work at Keele University in England and at the University of Texas, Austin. Since joining the faculty at SDSU in 2000, his work has been focused on transiting exoplanets, and in 2008 he was selected to join NASA's Kepler Mission. Dr. Welsh has been a pioneer in the field of circumbinary planets, a new class of planet that he helped establish. In 2015, he was honored with SDSU's College of Science’s Monty Award for outstanding faculty contributions.