Meet Dr. Marianne O’Byrne

Dr. Marianne O’Byrne enjoys working with adolescents, adults, and couples who are struggling to cope with a variety of life stressors and challenges. She particularly enjoys helping 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

Dr. O’Byrne helps 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, she empowers clients to cope more effectively with life’s struggles and to experience a greater quality of life.

Primarily, Dr. O’Byrne practices Cognitive Behavioral Therapy (CBT) and Emotion Focused Therapy (EFT). She also applies elements of Acceptance and Commitment Therapy (ACT), Schema-focused Therapy and Mindfulness-based approaches when appropriate. Dr. O’Byrne adopts a flexible approach to meet clients’ individual needs and treatment goals and is able to offer treatment in French.

Dr. O’Byrne’s 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.

She can be reached at: