Dr. Zeller is the Vice President of Psychiatry for CEP America and holds over 25 years of experience in Emergency Psychiatry. He is the former Chief of Psychiatric Emergency Services of the Alameda Health System, where he led one of the busiest psychiatric ERs in the USA and is Past-President of the American Association for Emergency Psychiatry. Dr. Zeller is the author of numerous scholarly articles and book chapters, lectures internationally as a keynote speaker, and was co-editor of one of the first comprehensive hardbound textbooks of Emergency Psychiatry. His published research and consultative work on improving delivery of emergency psychiatric care has led to major improvements and new programs across the country. Dr. Zeller has received numerous awards, including 2015 USA National "Doctor of the Year" from the National Council for Behavioral Health, 2013 “Person of the Year” from the California Hospital Association, and received the Holloman Award for Outstanding Achievement in Emergency Psychiatry. Dr. Zeller graduated with honors from Northwestern University School of Medicine and did his residency training at the Langley Porter Psychiatric Institute at the University of California at San Francisco.