Matt Sumner
Clinical Psychologist
Matt Sumner is a Clinical Psychologist with over two decades of experience supporting individuals, couples, and families to achieve personal growth and meaningful change. Genuine and straightforward in his approach, he works collaboratively with clients to navigate challenging periods and build self-understanding.
Matt believes that helping people gain insight into their unique personal history enables a deeper understanding and resolution of current difficulties. His empathetic, non-judgemental approach has assisted people across all walks of life and from many varied social, cultural and international backgrounds. He enjoys working with adolescents, adults, couples and families.
He has worked widely across hospitals, tertiary education, community, and correctional settings, supporting people from diverse cultural and social backgrounds. Alongside therapy, Matt provides professional supervision, coaching, and teaching for other clinicians. His therapeutic approach integrates evidence-based therapies, including Attachment-based Therapy, Schema Therapy, Acceptance and Commitment Therapy (ACT), Cognitive Behavioural Therapy (CBT), and Eye Movement Desensitisation and Reprocessing (EMDR).
Matt is registered with the Psychology Board of Australia. He is also an APS (Australian Psychological Society) Board Approved Supervisor and can provide supervision for Clinical Endorsement and general professional purposes.
Experience with First Responders and Defence Personnel
Matt has extensive experience in suicide prevention, drug and alcohol counselling, and trauma work, particularly with first responders and Defence personnel. As a preferred provider clinician for WAPOL, he understands the complex pressures faced by police and emergency workers, including the challenges of engaging those who may be reluctant to seek help. His grounded, empathetic approach supports clients to process trauma, rebuild confidence, and move forward with renewed stability and purpose.
Key interest areas
- Anxiety disorders
Depression & mood disorders
Relationship difficulties
Addictions, alcohol & drug related issues
PTSD
Trauma
Major life transitions
Life stressors
Grief and loss
Adolescent & young adult mental health
Self-esteem
Workplace issues
Emotional regulation difficulties
Key approaches to therapy
- Anxiety disorders
- Attachment-based therapy
- Schema therapy
- Acceptance and Commitment Therapy (ACT)
- Eye Movement Desensitization Reprocessing (EMDR)
- Cognitive Behavioural Therapy (CBT)











