Leslie S. Zun, M.D., M.B.A. is the System Chair of the Department of Emergency Medicine in the Sinai Health System in Chicago, Illinois and Chairman & Professor, Department of Emergency Medicine and a secondary appointment in the Department of Psychiatry at the Rosalind Franklin University of Medicine and Science/Chicago Medical School in North Chicago, Illinois. His background includes a medical degree (M.D.) from Rush Medical College and a business degree (M.B.A.) from Northwestern University's JL Kellogg School of Management.. He has presented his research and lectured on these topics both nationally and internationally. He is President of the American Association for Emergency Psychiatry and a board member of American Academy of Emergency Medicine and the. He is the chief editor of the Behavioral Emergencies for Emergency Physicians textbook and course director for the past seven years for the National Update on Behavioral Emergencies conference.