Mark Zelig served as a lieutenant on the Salt Lake City Police Department. Before retiring in 2001, he earned his Ph.D. in clinical psychology from the University of Alabama. He is board certified in Clinical Psychology, Forensic Psychology, and Police and Public Safety Psychology. Dr. Zelig has a national independent practice in forensic and police psychology, with offices in Utah and Alaska. He frequently serves as an expert witness for civil and criminal cases involving psychologically-based evidence. He conducts fitness-for-duty and pre-employment evaluations for high risk professions and for impaired professionals. He has served in numerous governance positions within APA and IACP, including chairing the Police and Public Safety Psychology Section of the American Psychological Association (APA). He has a combined total of more than 140 professional publications, presentations, and workshops.