Seth J. Gillihan, PhD, is a psychologist who specializes in cognitive behavioural therapy (CBT). Before focusing on his private practice in 2012, he was a full-time faculty member at the University of Pennsylvania and taught in the Psychology Department at Haverford College. He received his doctorate in psychology from the University of Pennsylvania, and is the author of multiple books on mindfulness and CBT and the host of the Think Act Be podcast. He lives in Philadelphia, Pennsylvania.