Beatrice Chestnut, PhD MA is a licensed psychotherapist, executive coach, and business consultant based in San Francisco. She has a PhD in communication studies and an MA in clinical psychology. Beatrice has been studying the Enneagram system of personality since 1990 and is author of the books, The Complete Enneagram: 27 Paths to Greater Self-Knowledge and The 9 Types of Leadership: Mastering the Art of People in the 21st-Century Workplace. Currently employed as adjunct faculty in Sonoma State University’s MA in Organization Development program, she has also taught at Northwestern University and the California Institute of Integral Studies. She trained to be a group facilitator at Stanford University’s Graduate School of Business in 2000. She served as president of the International Enneagram Association from 2006-2007 and teaches workshops on the Enneagram internationally, focusing on using it as a tool for leadership development and personal healing and transformation.