Hi, I’m John.

Trustee

Dr. Brentar is a licensed psychologist with decades of experience supporting children, adolescents, and adults through psychological assessment and therapy. His professional interests include learning disabilities, executive functioning, ADHD, anxiety, depression, autism spectrum disorders, and other developmental challenges.

Dr. Brentar spent 13 years at Children’s Health Council after his post doctoral fellowship. There, he served as a staff psychologist, Clinical Director, and Clinical Training Director. In 1993, he joined Morrissey-Compton Educational Center on a part-time basis and was later named Executive Director in 2006. Dr. Brentar left Morrissey Compton in 2026 to start John Brentar & Associates.

Known for his thoughtful, compassionate approach, Dr. Brentar is deeply committed to helping individuals better understand their strengths and challenges while providing families with practical guidance and support. His extensive clinical experience, combined with his calm and collaborative style, helps clients feel understood, supported, and confident throughout the evaluation process.

Outside of his professional work, Dr. Brentar enjoys spending time with family and friends, travel, and continuing to mentor and teach the next generation of clinicians.

Licensed Psychologist (CA Lic. No. PSY13146)