Registered Psychotherapist

Certified Addictions Counsellor

Master Therapeutic Counsellor

2nd location opening summer 2022

Located in Baysville & serving the whole of the Muskoka Region.

Email for more info and/or to be added to the waitlist. 

Professional Individual, Couples & Family Counselling Services
Flexible Scheduling - Day, Evening & Weekend Availability
Same Day Addiction Treatment Assessments
PIPEDA Compliant Telehealth Video Counselling Available
Online Booking


After graduating from the School of Law & Social Sciences at Manchester University in 2003, with both an honours degree and a professional diploma, Diane spent several years specializing in Cognitive Behavioural Therapy and Motivational Interviewing. Behavioural analysis, risk assessments, sentencing proposals and court prosecutions were an every day part of her routine within the Home Office. Working through the cycle of change with mandated, high-risk clients who were often resistant to the process served to consolidate her belief that no matter how fraught with difficulties an individual's situation may be they can work through it all with the right support.

Recruited from overseas, she migrated to Canada in 2007 where she has spent the past decade counselling clients through life's ups and downs in a variety of domains; forensic mental health, concurrent disorders, substance abuse, behavioural adictions, trauma and gerontology. 

Diane complements her private practice by providing Community Addictions Liaison to Emergency Depts within the Mississauga Halton LHIN within a non-profit framework

Diane holds the designation of Master Therapeutic Counsellor and has earned specialized counselling certifications in both substance abuse and behavioural addictions. As such she is registered with several overseeing bodies so clients can be confident that they are receiving support from a psychotherapist who has the necessary balance of qualifications, experience and accountability to provide ethical, professional and effective counselling services.


Acceptance and change are fundamental to our emotional well-being and everyone has the capacity to find their own harmony between the two. Diane works from a client-centred perspective empowering individuals, couples and families to develop the skills, tools and fresh perspectives required to reach this equilibrium. Her approach to counselling is individually tailored to every client and draws from a variety of treatment models including but not limited to:-


Cognitive Behavioural Therapy (CBT)

Dialectical Behavioural Therapy (DBT)

Trauma-informed Counselling

Emotionally Foucssed Therapy

Brief Solution Focussed Therapy

Motivational Interviewing

As an accredited GAINS (Global Assessment of Individual Needs) assessor Diane is also able to complete comprehensive addiction assessment reports for residential treatment, employers and court hearings.

Areas of Expertise

Anxiety . Grief . Substance Abuse . Interventions . Gerontology . Mood Disorders . Behavioural Addictions (ie. sex/compulsive gambling) . Criminal Justice . Domestic Violence . Abuse . Trauma . Work/Life Balance . Parenting . Divorce . Social Anxiety . Excessive Technology Use . Gender Identity . Addiction Treatment Assessment .

Diane - DG Psychotherapy

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14799 Airport Rd, Caledon East, ON L7C 2X8

Diane Guy is a registered member of: - 

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