Petra Psychological
Services,  L.L.C.

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Dr. Dawn Gullette Crosson is a native of Philadelphia, PA and received a Master's Degree in Community Psychology from the Pennsylvania State University. She later graduated from the Philadelphia College of Osteopathic Medicine with a Doctorate Degree in Clinical Psychology. She is a licensed Psychologist, trained in Cognitive Behavior Therapy (CBT) and Trauma Focused CBT and has been in the field of psychology since 1996. 

Dr. Crosson has a vast array of experience within human services. Beginning her career as a Rehabilitative Assistant, she developed hands on experience providing direct care to those most in need. Dr. Crosson has provided therapy, supervision, and direct care for Family Reunification & Preservation and Behavioral Health & Rehabilitation Services. She has served as Director for Foster Care, Host Home, and After-School programs. 

Dr. Crosson provides comprehensive Diagnostic Evaluations and Outpatient Therapy. She treats a variety of mental health ailments including Conduct, Mood, Anxiety, and Personality Disorders. She specializes in treating children that have been victims of sexual abuse.


Dr. Crosson is a noted trainer and has taught post-secondary collegiate classes.  Her training provides understanding and treatment of mental health disorders.


Dr. Crosson is a member of the American Psychological Association (APA), the Pennsylvania Psychological Association (PPA) and the Association for The Treatment of Sexual Abusers (ATSA).




Petra Psychological Services
Dawn Gullette Crosson, Psy.D

PA Licensed Psychologist


845 Sir Thomas Ct Suite 2B
Harrisburg, PA. 17109
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