IFP’s Principal Psychologists

Lewis Z. Schlosser, PhD, ABPP is the managing partner at IFP. He is a licensed psychologist in New York and New Jersey. Dr. Schlosser is Board Certified in Police and Public Safety Psychology (Diplomate of the American Board of Professional Psychology); he is also Board Certified in Counseling Psychology. He is a former tenured Associate Professor at Seton Hall University (2003-2012) and former in-house Director of Psychological Services for the New York City Correction Department (2006-2015). Dr. Schlosser has conducted over 7,500 law enforcement recruit, fitness for duty evaluations, and promotional evaluations. He has served as an examiner with IFP since 2011. Dr. Schlosser 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 New Jersey State Association of Chiefs of Police and Bergen County Police Chief’s Association. Dr. Schlosser can be reached at lew@ifp-testing.com or by clicking here .

Matthew E. Guller, JD, PhD, ABPP is co-owner of IFP and is a clinical psychologist licensed in New York and New Jersey. 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 on the in-house psychological staff of the Port Authority of New York and New Jersey and 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 New Jersey State Association of Chiefs of Police and Bergen County Police Chief’s Association.

Krista L. Dettle, PhD, is co-owner of IFP and is a licensed psychologist in the states of New York and New Jersey. Dr. Dettle was formerly employed with the NYC Department of Correction where she conducted psychological evaluations for the Applicant Investigation Unit. Dr. Dettle also teaches psychological assessment to graduate students at William Paterson University. Dr. Dettle is a member of the Police Psychological Services Section of the International Association of Chiefs of Police. She is also an affiliate member of the New Jersey State Association of Chiefs of Police and Bergen County Police Chief’s Association. Dr. Dettle can be reached at krista@ifp-testing.com or by clicking here.

Associates – Headquarters Office

Guillermo Gallegos, PhD, is a clinical psychologist licensed in New Jersey and New York. Dr. Gallegos has served as an examiner with IFP since 2000, where he has conducted over 10,000 law enforcement recruit, fitness for duty and promotional evaluations. Prior to joining IFP, Dr. Gallegos was the lead psychologist for the New Jersey Department of Corrections’ Northern State Prison in Newark. In this role, he had extensive experience conducting recruit screenings (with IFP) and fitness for duty evaluations for the New Jersey Department of Corrections. He has also examined candidates for the DEA, TSA and the Federal Air Marshal Service. A native of Peru, Dr. Gallegos is fluent in Spanish.​

Associates – Philadelphia Regional Office

Andrew Wolanin, Psy.D., is a licensed psychologist in the States of Pennsylvania and New Jersey. He provides psychological evaluations for the Philadelphia regional office and has conducted public safety pre-employment screening, fitness for duty and critical incident evaluations. He is the former director of the department of advanced studies in psychology at Kean University. Dr. Wolanin is a member of the Society for Police and Criminal Psychology and the past president of the Philadelphia Behavior Therapy Association. Dr. Wolanin has conducted over 1,000 public safety evaluations.

Administrative Staff – Headquarters

Jaclyn Margherita, MA, Senior Executive Associate: Ms. Margherita holds a Master’s Degree in Forensic Psychology from John Jay College of Criminal Justice. She joined the staff of IFP in 2009, and assists in test administration, scoring and research.

Olivia McCullough, MA, Executive Associate: Ms. McCullough holds a Master’s Degree in Forensic Psychology from John Jay College of Criminal Justice. She joined the staff of IFP in 2014, and assists in test administration, scoring and research.

Gina Bellacera, MA, Psychological and Administrative Associate: Ms. Bellacera holds a Master’s Degree in Counseling from Kean University. She joined the staff of IFP in 2014, and assists in test administration, scoring and research.

Julia Giannella, MA, Psychological and Administrative Associate: Ms. Giannella holds a Master’s Degree in Forensic Psychology from John Jay College of Criminal Justice. She joined the staff of IFP in 2015, and assists in test administration, scoring and research.

Elysse Tague, MA, Psychological and Administrative Associate: Ms. Tague holds a Master’s Degree in Forensic Psychology from John Jay College of Criminal Justice. She joined the staff of IFP in 2018, and assists in test administration, scoring and research.

Wendy Cianciaruso, BFA, Office Manager: Ms. Cianciaruso holds a Bachelor’s Degree in Graphic Design. She joined the staff of IFP in 2008, and handles customer relations, billing, and general office duties.

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