Crisis - 9-8-8 (call or text) or 9-1-1 Site web francophone en cours
The team
Nancy McNicoll
Matthew Lemieux
Nancy McNicoll
Registered Psychotherapist
MA Counselling Psychology
Sonia Akhoury
Matthew Lemieux
Nancy McNicoll
Occupational Therapist
B.Sc. (OT)
Matthew Lemieux
Matthew Lemieux
Matthew Lemieux
Registered Massage Therapist & Recreational Therapist
RMT
BA Criminal Justice
Marissa Lafleur
Ayden Manitowabi
Matthew Lemieux
Mental Health Counsellor, Social Work Student
BA Psychology
MA Social Work (in progress)
Ayden Manitowabi
Ayden Manitowabi
Ayden Manitowabi
Occupational Therapy Assistant
BA Psychology (in-progress)
Mallika Gupta
Ayden Manitowabi
Ayden Manitowabi
Mental Health Counsellor & Psychometrist
MSc Clinical Psychology
Angela Hillis
Angela Hillis
Angela Hillis
Student Intern (starting in January 2026)
Natalie Castonguay
Natalie Castonguay
Natalie Castonguay
Registered Nurse, Psychotherapist
Clinic Founder & Director
RN, CpedN(C), CPMHN(C)
Spencer O'Brien
Natalie Castonguay
Natalie Castonguay
Mental Health Counsellor
BA Psychology, Development & Stream in Mental Health and Well-Being
Madison McAllister
Natalie Castonguay
Madison McAllister
Mental Health Counsellor & OT Student
B.Sc. Kinesiology, MHSc.OT (in progress)
Kimberly Kerr
Alejandra Ramos
Madison McAllister
Communication Disorders Assistant & Clinical Assistant
B.Sc. Psychology
Graduate Diploma Communication Disorders Assistant
Samuel Murdock
Alejandra Ramos
Alejandra Ramos
Technical Resource Specialist
Alejandra Ramos
Alejandra Ramos
Alejandra Ramos
Communication Disorders Assistant
BA Psychology and Linguistics
Graduate Diploma Communication Disorders Assistant
Our Story
Dimensions Centre was founded by Natalie Castonguay, a Registered Nurse, veteran, former first responder and mother of five twice-exceptional, AuDHD children. Her personal experiences navigating the healthcare system highlighted significant gaps, inspiring her to create an interprofessional health and allied health clinic in Ottawa. The clinic aims to be a safe and inclusive space for everyone, particularly for neurodivergent individuals, 2SLGBTQIA+ folx, and veterans/first responders, while also fostering a supportive and empowering environment for staff. We don't just fill gaps in the healthcare system—we create innovative solutions from the ground up.
Our Logo
A work of art and a statement of purpose, our logo was masterfully crafted by two autistic individuals. At its heart is an intricate optical illusion—a dynamic box that both contains and breaks free, holding a 'd' for Dimensions at its core. This single image embodies our motto: "Out of the Box Therapeutic Approaches", which is our guiding principle. It's a commitment to going beyond the conventional, to seeing the problems others miss, and to building revolutionary solutions that make a real, tangible difference in people's lives. The vibrant tapestry of colors mirrors the broad spectrum of our interdisciplinary services, while the shifting perspective of the design itself celebrates the diverse points of view that guide our innovative, client-centered care.
