Justine Mahler, Psy.D.

About Dr. Mahler

Whether you’re feeling stuck, overwhelmed, navigating a major change, or simply ready for something in your life to feel different, Dr. Justine Mahler offers a space to feel understood while working toward meaningful change. She works with children, adolescents, adults, couples, and families, bringing warmth, authenticity, and a collaborative approach to each therapeutic relationship.

Dr. Mahler earned her Psy.D. in School-Community Psychology from Hofstra University and has broad experience across clinical, school, forensic, and assessment settings. She completed her clinical internship at the Bio-Behavioral Institute, where she received specialized training in Exposure and Response Prevention (ERP) and the treatment of OCD, Body Dysmorphic Disorder, anxiety, depression, and related concerns. Her professional work has also been presented at national and international conferences, including NASP in Colorado and the International Academy of Law and Mental Health in Barcelona, Spain.

Her approach is integrative and individualized, drawing from CBT, ERP, ACT, DBT, mindfulness, and Positive Psychology. Whether clients are struggling with anxiety, relationships, difficult patterns, or major life transitions, Dr. Mahler balances compassion and validation with insight and practical strategies, helping clients better understand themselves, build confidence, and create meaningful, lasting change.

Areas of focus

• Anxiety
• Depression
• Relationship Issues
• OCD
• Body Dysmorphic Disorder
• Hoarding
• Emerging adulthood
• Career transitions
• Family restructuring & divorce
• Grief & loss

Approach & methods

Dr. Mahler draws on several evidence-based modalities, matching the method to the person rather than the other way around:

• Cognitive Behavioral Therapy (CBT)
• Exposure & Response Prevention (ERP)
• Acceptance & Commitment Therapy (ACT)
• Dialectical Behavior Therapy (DBT)
• Rational Emotive Behavior Therapy (REBT)
• Mindfulness
• Positive Psychology

Background & training

• Clinical internship, Bio-Behavioral Institute. Individual and intensive outpatient therapy for OCD, BDD, and hoarding, developing strong proficiency in ERP.
• Therapist & clinical coordinator, Hofstra Institute for Family Forensic Psychology. Therapy and coordination within a family-forensic setting.
• Intern school psychologist, Long Island districts (2021–2024). Counseling and evaluations for students from elementary through high school.
• Additional clinical work. Therapy at the Positive Psychology Institute for Emerging Adults and assessments through the Psychological Evaluation, Research and Counseling Clinic.

Education & scholarship