About Us 

Over twenty years ago, Dr. Jon Mills founded Mills | Gosse Psychology to address our local community's growing need for quality and timely psychological services. Ever since, we have proudly served the Durham Region and the Greater Toronto Area (GTA). Now retired from clinical practice, Dr. Mills remains an internationally recognized scholar, writer, and teacher who actively lectures worldwide.

Today, Mills | Gosse Psychology continues to thrive under Scott Gosse, our director and chief psychologist, who supervises a diverse team of compassionate and highly trained clinicians dedicated to providing accessible and client-centred psychological services tailored to children, adolescents, and adults.

Mills | Gosse Psychology - Therapy and Assessment Services in Ajax, Ontario in Durham Region by a Psychologist.

Our Psychology Services  

At Mills | Gosse Psychology, we are dedicated to providing a comprehensive range of services tailored to meet the diverse needs of our clients. Our offerings include Rehabilitation Assessment and Treatment services, including serving Workplace Safety and Insurance Board (WSIB) and motor vehicle accident (MVA) claimants. We have a long history of serving first responder groups, including police, fire, corrections, EMS, and others. We also provide expert psychological therapy and counselling for adults, children, adolescents and teens. Additionally, our specialized psychological assessment and testing services include psycho-educational, gifted, ADHD, and general psychological and diagnostic evaluations.  

We proudly offer a wide range of psychological services, including:

Rehabilitation Assessment & Treatment

Therapy & Counselling

Assessment & Testing

Community Partnerships & Referrals

Mills | Gosse Psychology - Therapy and Assessment Services in Durham Region by a Psychologist.
Mills | Gosse Psychology - Therapy and Assessment in Durham Region by a Psychologist.

Conditions & Issues

At Mills | Gosse Psychology, we provide comprehensive assistance for a variety of prevalent mental health conditions and issues. Our services cover areas such as anxiety, panic, and phobias, as well as depression and mood disorders. We also offer support for attention-deficit/hyperactivity disorder (ADHD), trauma, posttraumatic stress disorder (PTSD), obsessive-compulsive disorder (OCD), and challenges such as anger management, grief and bereavement, sleep disorders, and relationship and family issues. Our dedicated team is committed to helping clients navigate these challenges and find the support they need for improved well-being. 

We support our clients with a wide range of common mental health challenges.

Mills | Gosse Psychology - Therapy and Assessment in Durham Region by a Psychologist.
Mills | Gosse Psychology - Therapy and Assessment in Durham Region by a Psychologist.

Working With Us 

With our extensive experience, we take pride in maintaining a practice that operates seamlessly and efficiently, all to serve our local community better. 

  • Team: A diverse team of clinical assessors and therapists who offer services in several languages.  

  • Locations: Our head office is in Ajax, Ontario, and we have a dedicated team working throughout Durham, Peterborough, Kawartha, and the Greater Toronto Area (GTA).  

  • Appointments: Can be arranged in person, over the phone, or online through secure video platforms. We strive to provide accessible care and typically do not hold waitlists.  

  • Referrals: Our services do not require a physician’s referral. However, we accept referrals from various providers and organizations supporting employees.  

  • Fees & Payments: Our services are covered through most third-party health insurance plans, including employee benefits and WSIB. To ensure accessibility, we offer a sliding fee scale to qualified clients. We accept credit cards and e-transfers.   

  • Mills | Gosse Psychology is the operating name of Gosse Psychology Professional Corporation.  

Mills | Gosse Psychology - Therapy and Assessment in Durham Region by a Psychologist.

If you are seeking the support of a therapist or psychologist, please reach out today. Mills | Gosse Psychology is here to help.