About Dr. Jonathan Gransee, PSY.D.

Licensed Clinical Psychologist


Dr. Jonathan M. Gransee is a forensic and clinical psychologist in private practice in Lancaster, Pennsylvania, and Philadelphia, Pennsylvania.
Dr. Gransee practices primarily in the area of forensic psychological evaluations and court testimony for civil and criminal cases. Dr. Gransee is routinely retained by prosecution and defense counsel for his services. In addition, Dr. Gransee provides psychological evaluations for custody cases and diagnosing diseases. He also performs IQ and achievement testing, as well as testing for ADHD, autism, and more.
Over the past several decades, Dr. Gransee’s private practice has provided services to multiple entities, including working with multiple child-focused agencies conducting BHRS evaluations, contracting with the State Disability program, contracting with several Veteran Evaluation companies, contracting with multiple county Children and Youth agencies, and also working with many attorneys and courts. Dr. Gransee has provided continuing education seminars for attorneys, psychologists, and marriage/family therapists and social workers. He has also supervised multiple interns, over the years, in the provision of psychological services, including evaluations and therapy. Dr. Gransee has also conducted educational seminars for the general population on the topic of Mindfulness.


Dr. Lisa Janetta earned her doctoral degree in Clinical Psychology, as well as her master’s degree in Clinical Psychology and her bachelor’s degree in Elementary Education. She works in two private practices, conducting psychotherapy and psychological evaluations.
Client populations for psychotherapy include mood, anxiety, depression, personality, trauma, and eating disorders in children, adolescents, and adults, as well as couple’s psychotherapy. Psychological evaulations are performed for forensics, pre-bariatric surgery, pre-spinal cord stimulator surgery, and intellectual and personality functioning.
Dr. Jannetta supervises doctoral interns and post-doctoral psychological associates, as well as teaches as an adjunct professor at Immaculata University.


Licensed Psychologist

Robert earned a bachelor’s degree in psychology from Duquesne University and a master’s degree and certificate of advanced graduate study in clinical psychology from Springfield College. Robert is a Pennsylvania licensed psychologist with over 40 years of experience, which includes working at a vocational rehabilitation center with persons with multiple disabilities, working at a rehabilitation hospital, treating patients with head trauma and patients with chronic pain, working in a private, independent practice and working in an outpatient mental health center.
Robert’s areas of clinical expertise include client centered psychotherapy, cognitive behavioral therapy, pain management therapy, marital counseling, couples counseling, family therapy, vocational counseling, diagnostic psychological evaluations, evaluation of attention deficit disorder, court ordered/forensic psychological evaluations, neuropsychological evaluations, vocational evaluations, and testifying as an expert witness.
Robert is available for scheduling daytime appointments Monday through Friday.

Forensic practice

General forensic practice includes forensic evaluations, consultation with attorneys, and testimony. Dr. Gransee has participated in many cases of court testimony, and is a seasoned professional in this area.

court cases involving

Child Custody
Parenting Capacity/Competency
Abuse cases
Murder or attempted murder
Sexual assault
Juvenile Decertification