Mark Siegert, PhD is a Clinical and Forensic Psychologist and a principal in Threat Assessment Experts (www.ThreatAssessmentExperts.com). He is a former faculty member at Harvard University, Harvard Medical School and Columbia University. He will be presenting his work on “Direct, Indirect and Perceived Threats: Challenges posed by the American’s with Disabilities Act (ADA)” at the Association of Threat Assessment Professionals (ATAP) 23rd Annual Threat Management Conference on Aug. 14, in Anaheim, Calif. His decades of experience in Forensic Psychology (www.ForensicPsychologyExpert.com) include extensive evaluations of violent perpetrators, Violence Risk Assessment and Fitness-for-Duty Examinations for employees, students and defendants. His expertise has led him to be interviewed on The O'Reilly Factor, Connie Chung, Paula Zahn, Crossfire, and NPR.