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Marian Boer, Ph.D., C. Psych

Registered Psychologist

Dr. Marian Boer, Ph.D., C. Psych. is a clinical and school psychologist in private practice in Barrie. Marian works with children, youth, young adults and their families to provide assessments to help understand learning, developmental and mental health challenges, as well as therapy to address mental health and behavioural challenges that interfere with learning, adjustment and enjoyment of daily activities.

After completing a master’s degree in psychology from the University of Toronto, Marian worked in children’s mental health services in Thunder Bay, ON for several years. She returned to the University of Toronto to complete her Ph.D. in School and Clinical Psychology and completed an internship in the Anxiety Disorders Clinic at Sick Kids Hospital. Marian has spent much of her career in the public sector working in education, hospital, and children’s mental health settings to deliver psychological services. Marian has held leadership and supervisory positions in various school boards to oversee the delivery of psychological, speech and language, behavioural and counselling services.

Currently, Marian provides assessment and consultation services to school boards, children’s mental health agencies and various community and private organizations and agencies in Simcoe County and surrounding area. Assessments include a significant focus to answer questions about autism, learning disabilities, intellectual disabilities, ADHD and assessments for youth and young adults to support the transition to post-secondary settings. Therapy and interventions include support to address anxiety and depression in children, youth and young adults, pain management for children and youth, and challenges related to performance in sports.

Marian is proud to serve as a board director for the Child and Youth Advocacy Centre-Simcoe Muskoka (CYAC-Simcoe Muskoka) and the College of Psychologists and Behaviour Analysts of Ontario.


Dalton Associates (DA) and Launch Behavioural Health acknowledge that we are situated on Turtle Island, that has been inhabited by Indigenous Peoples from the beginning. As a settler-owned organization, we are always working on de-colonizing our practices and offering mental health services that reflect a wholistic approach to health and wellness. Our clients come from a variety of backgrounds, and include First Nations, Métis, and Inuit peoples. We want to do more than make a difference at an individual level: we aspire to support a societal shift in the way that mental health is addressed and cared for, and we believe that a cross-cultural approach, bringing Indigenous worldviews to the forefront, is necessary to help break the system and rebuild it in a way that promotes healthy wellbeing for future generations. We are actively engaged in changing the landscape of mental health care in Ontario, by augmenting (and compensating) the voices and experiences of Indigenous knowledge keepers, and by incorporating Indigenous values and teachings in our program models.