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Dr. Marianne O'Byrne
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About Me

I am a Psychologist who graduated from the Counselling and Clinical Psychology program at the University of Toronto (OISE/UT). At Thrive Psychology and Wellness Centre, I am here to guide you through life’s most complex and difficult matters.



I particularly enjoy helping those with:

– Anxiety, depression, and relationship issues

– Prenatal and postpartum transition difficulties, including birth trauma, grief and loss

– PTSD and other difficulties related to traumatic experiences



I help clients understand and address their difficulties by focusing on unmet emotional needs, building on existing strengths to improve resilience and emotion regulation skills, and paying attention to the interplay of thoughts, physical reactions, and behaviour. In doing so, I empower clients to cope more effectively with life’s struggles and to experience a greater quality of life.



Primarily, I practice Cognitive Behavioral Therapy (CBT) and Emotion Focused Therapy (EFT). I also apply elements of Acceptance and Commitment Therapy (ACT), Schema-focused Therapy and Mindfulness-based approaches when appropriate. I adopt a flexible approach to meet clients’ individual needs and treatment goals and am able to offer treatment in French.



My recent professional experience includes positions at Brampton Civic Hospital, North York General Hospital, the Psychological Trauma Program and the Clinical Research Unit at the Centre for Addiction and Mental Health (CAMH), as well as involvement in a clinical research trial at York and Ryerson Universities.



Outside of work and school, I am a proud mother of a three wonderful and energetic children and I also enjoy outdoor activities, such as hiking.

Contact Information and Address

Email: [email protected]

Website: Go to website


Work Address

PO Box 74084, Ottawa, ON, K1M 2H9

Phone: (613) 703-0277

Professional Information

Sliding Scale: Yes

Age Group: Adult

Remote Assessment: Yes

Virtual Services: Yes

Area of Practice: Clinical

Service Language: English, French

Problem Area: Anxiety, Assertiveness, Family Therapy, First Responders/PSP, Obsessive Compulsive Disorder (OCD), Relationship Issues, Relaxation/Stress Management, Other: WSIB / VAC