About Castillo Counselling & Associates

Castillo Counselling & Associates is a multidisciplinary, holistic practice dedicated to supporting clients of all ages. 

We work with children, adolescents, and adults, providing integrated mental health and medically informed services that honour the connection between mind, body, and spirit.

We are proud to support individuals, families, and teams across Ontario, including Northern Ontario communities, through both in‑person and virtual services.

Our Founder

Andrea Castillo-Perez founded Castillo Counselling & Associates with a goal to create a multidisciplinary team that could support mental health from multiple angles — clinical therapy, trauma-informed and trauma-focused care, workplace mental health, and wellness-based supports — all grounded in professional standards and evidence-based practice.

Under Andrea’s clinical leadership, the practice brings particular depth in trauma therapy, EMDR, and critical incident stress management, while remaining accessible to individuals seeking support for anxiety, stress, grief, and life challenges.

We bring together psychotherapy, clinical expertise, and collaborative care to create a safe, welcoming environment where people feel seen, respected, and supported.

Our Team

A compassionate, multidisciplinary team supporting mental health in Sarnia and across Ontario.

Andrea Castillo-Perez

Registered Psychotherapist
Registered Nurse

Dr. Justin Mall

Medical Associate
Family Medicine/ER Physician

Dr. Yazan Honjol

Medical Associate
Family Medicine/ER Physician

Jen Mezzatesta

Registered Nurse Psychotherapist

Beth Van Reenen

Registered Social
Service Worker

Steph Jean

Registered Psychotherapist (Qualifying)

Ben Nazar

Fitness & Nutrition Coach

Ruth Douthwright

Therapeutic Movement Practitioner

Melanie Hall

Office Admin

Howie

Chief Happiness Officer

Our team supports people navigating trauma, anxiety, neurodivergency, life transitions, and occupational stress. 

• Anxiety & Depression
• Trauma & PTSD
• Grief & Loss
• Self-Esteem & Emotional Regulation
• Religious & Spiritual Trauma
• Occupational Stress & Burnout
• Family & Relational Counselling

Workplace & Leadership Support

In addition to individual and group therapy, Castillo Counselling & Associates provides trauma-informed support for workplaces, leadership teams, and organizations operating in high-stress environments.

This work is led by trained clinicians and grounded in Critical Incident Stress Management principles, with a focus on psychological safety, recovery, and resilience following critical incidents or prolonged occupational stress.

Serving Communities Across Ontario

We serve clients in Sarnia, Strathroy, London, Northern Ontario, and remotely across Ontario.

Whether you’re seeking personal support or organizational services, we invite you to connect with our team.