Lewis Z. Schlosser, PhD, ABPP is the managing partner at the Institute for Forensic Psychology, which is a police and public safety focused specialty practice currently serving agencies in New Jersey, New York, Maine, Pennsylvania, Virginia, Delaware, Connecticut, and Massachusetts. Dr. Schlosser is a licensed psychologist in all eight states currently served by IFP. He is Board Certified in Police and Public Safety Psychology and Counseling Psychology by the American Board of Professional Psychology. He is a former tenured Associate Professor at Seton Hall University and former in-house Director of Psychological Services for the New York City Correction Department. Dr. Schlosser has conducted over 20,000 police and public safety psychological evaluations, including pre-employment, promotional, and fitness for duty.
Dr. Schlosser provides training to police and public safety personnel on a variety of topics related to officer mental health, with special expertise in fitness for duty and officer wellness. He has presented locally and nationally, including at the International Association of Chiefs of Police (IACP) Annual Conference, the IACP Officer Safety and Wellness Conference, the FBI-NAA NJ Chapter Annual Training Conference, the Mid-Atlantic Law Enforcement Executive Development Seminar Annual Training Conference, and the New Jersey State PBA Mini-Convention. Dr. Schlosser regularly serves as an instructor for the New Jersey State Association of Chiefs of Police; he has also conducted training for the Connecticut Police Chiefs Association, the Delaware Association of Chiefs of Police, the Massachusetts Chiefs of Police Association, and the Maine Chiefs of Police Association.
Dr. Schlosser is a member and past Chair of the IACP Police Psychological Services Section. He currently serves as the Chief Psychologist for the New Jersey State Association of Chiefs of Police, the Delaware Association of Chiefs of Police, and the Massachusetts Chiefs of Police Association. Dr. Schlosser is an Affiliate/Associate Member of the Connecticut Police Chiefs Association, the Delaware Association of Chiefs of Police, the Maine Chiefs of Police Association, the Massachusetts Chiefs of Police Association, and the New Jersey State Association of Chiefs of Police. He currently serves as a Member-at-Large on the American Board of Police and Public Safety Psychology.
Dr. Schlosser earned his Bachelor’s degree in Psychology, his Master’s degree in Rehabilitation Counseling, and his PhD in Counseling Psychology, all from the University of Maryland at College Park.
Krista L. Dettle, PhD, ABPP is co-owner of IFP and is a licensed psychologist in the states of New Jersey, New York, Connecticut, Delaware, Massachusetts, Virginia, and Maine. Dr. Dettle is Board Certified in Police and Public Safety Psychology by the American Board of Professional Psychology. Dr. Dettle has conducted over 15,000 psychological evaluations for law enforcement, including pre-employment, fitness for duty evaluations, and promotional evaluations. She also conducts officer wellness sessions and critical incident debriefings. Dr. Dettle was formerly employed with the NYC Department of Correction where she conducted pre-employment psychological evaluations. She also taught graduate and undergraduate students as an adjunct professor at Seton Hall University and William Paterson University. Dr. Dettle is a member of the Police Psychological Services Section of the IACP. She is also an affiliate member of the NJSACOP and the BCPCA.
Matthew E. Guller, JD, PhD, ABPP is co-owner of IFP and is a clinical psychologist licensed in New York, New Jersey, and Virginia. Dr. Guller served as IFP’s in-house counsel from 1994 until 2009, specializing in legal issues associated with the evaluation of public safety personnel. He has served as a licensed psychologist with IFP since 2006. He is Board Certified in Police and Public Safety Psychology (Diplomate of the American Board of Professional Psychology). He is an adjunct professor of forensic and police psychology at Fairleigh Dickinson University’s graduate program in forensic psychology. He is an annual instructor at the Somerset County (NJ) and Rockland County (NY) Police Academies. Dr. Guller is a member of the Police Psychological Services Section of the International Association of Chiefs of Police. He is also an affiliate member of the NJSACOP and Bergen County Police Chief’s Association (BCPCA).
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Christopher A. Sbaratta, PhD, ABPP is a licensed psychologist in New York, New Jersey, Virginia, and Maine. He is the former Director of the Psychological Services Unit for the New York City Correction Department (NYCD). Dr. Sbaratta has published research in law-enforcement career choice and has conducted over 2,000 pre-employment assessments of correction officer candidates and other public safety recruits. Prior to this position, he served as adjunct faculty and completed a postdoctoral fellowship at New York University with a specialization in substance abuse assessment and evaluation.
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Sandra Ackerman Sinclair, PhD is a full-time psychologist with IFP. She is a licensed psychologist in the states of New York, New Jersey, Maine, and Pennsylvania. Dr. Ackerman Sinclair has served as an examiner with IFP since March 2013, shifting to full time status in 2019. Prior to joining IFP full time, Dr. Ackerman Sinclair served as a Post-Doctoral Intern for the New York City Correction Department (NYCD): Psychological Services Unit. From 2012-2019 she served as Staff Psychologist and Assistant Director for Outreach at Seton Hall University’s Counseling and Psychological Services. Prior to these professional roles she completed her pre-doctoral internship at the East Orange and Lyons New Jersey Veteran’s Affairs Hospitals with a focus on post-traumatic stress disorder and substance abuse. Dr. Ackerman Sinclair is a former member of the New Jersey Psychological Association Ethics Resource Committee, past board member for the Essex and Union County Association of Psychologists, and current member of the Police Psychological Services Section of the International Association of Chiefs of Police (IACP).
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David Han Zhang Liang, PhD is a licensed psychologist in the states of New York, New Jersey, Pennsylvania, and Delaware. He has served as a consulting psychologist with IFP since 2015, and has been a full-time staff psychologist since 2021. Dr. Liang has performed over 12,000 psychological evaluations for law enforcement, including pre-employment and fitness for duty evaluations. Dr. Liang was also a former Lead Psychologist of the Applicant Investigation Unit for the New York City Department of Correction (2013-2021). He has taught graduate courses in psychological assessment at Caldwell University.
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Dr. Jen Buhler, PsyD is a licensed psychologist in the states of New Jersey, New York, Pennsylvania, and Delaware. She worked with IFP as a consulting psychologist from October 2020 to February 2023, when she joined as a principal psychologist focused on conducting pre-employment psychological evaluations for public safety candidates on a full-time basis. Her previous background includes evaluations and treatment with the severe and persistent mentally ill population in both hospital and forensic settings. She was most recently the forensic psychology supervisor in a maximum-security, state forensic facility (2017-2022) in Delaware. She has also worked as an adjunct professor at Goldey-Beacom College since March of 2013 teaching at both the undergraduate and graduate levels.
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