Jerry Wagner, Ph.D. is a clinical psychologist, therapist, and consultant in private practice, and is a faculty member in the Department of Psychology and the Institute of Pastoral Studies at Loyola University, Chicago. He is the author of the Enneagram Spectrum of Personality Styles: an Introductory Guide; the Wagner Enneagram Personality Style Scales (WEPSS); and Two Windows on the Self: the Enneagram and the Myers-Briggs. Jerry has been researching and teaching the Enneagram for over 30 years and has offered the Enneagram Spectrum Training and Certification Program nationally and internationally for the past 15 years. Jerry is a Founder of the International Enneagram Association and is an editor of the Enneagram Journal.