Professor Kessler is a national expert in the field of trial advocacy training. He is the director of the National Institute of Trial Advocacy's Master Advocates' Program, the co-director of the National Institute for Trial Advocacy's Northeast Regional Program, and a team leader and teacher in Advocacy Teacher Training and Trial Advocacy courses at law schools and agencies throughout the country. He has also designed advocacy programs for groups as diverse as the New York State Department of Health and the District Attorney's Office of Queens County.
Professor Kessler, former law clerk to Judge Edward C. McLean, United States District Court for the Southern District of New York, has also served on the faculty of the University of Cincinnati College of Law. He is a former senior trial attorney for the Legal Aid Society, Federal Court Branch, and has actively practiced law as a criminal defense attorney in the Federal District Courts for more than 25 years.