Our Team

Dr. Heather Hood

Psychologist, Clinic Director

Dr. Hood is a Clinical Psychologist registered with the College of Psychologists of Ontario (CPO). She provides clinical assessment and evidence-based therapy for a range of emotional and adjustment related difficulties, with a primary focus on the treatment of anxiety, insomnia, and perinatal mood and anxiety difficulties. She primarily works from a Cognitive Behavioural Therapy (CBT) framework, and also incorporates Acceptance and Commitment Therapy (ACT), Dialectical Behaviour Therapy (DBT), and Motivational Interviewing (MI) treatments when indicated.

Dr. Hood has received specialized training and has expertise in treating anxiety, obsessive-compulsive (e.g., OCD, trichotillomania, skin picking), insomnia, depression and bipolar, and trauma-related (i.e., PTSD) disorders. Other areas of clinical interest include stress, health anxiety, and emotion regulation difficulties.

Dr. Hood holds adjunct faculty appointments with McMaster University and the University of Waterloo. She provides supervision to psychiatry residents, psychologists during their supervised practice phase, and allied health professionals looking to increase their proficiency in delivering evidence-based therapies. She enjoys teaching and has taught in undergraduate and graduate psychology programs, college degree programs, and undergraduate medical education. She has also provided engaging and comprehensive training, workshops, and consultation to organizations, including Addiction Services for York Region, Guelph Family Health Team, and the Homewood Health Centre.

Dr. Heather Hood received her Ph.D. in Clinical Psychology from Ryerson University and completed her pre-doctoral residency at St. Joseph’s Healthcare Hamilton, where she received specialized training in inpatient and outpatient mood and anxiety disorders, and health psychology. She has worked as a staff psychologist at the Homewood Health Centre in Guelph, and in various inpatient, outpatient, and consultative roles. She has authored a number of peer-reviewed journal articles and book chapters in the area of anxiety disorders and their treatment, and she has presented her research at several national and international conferences.

Dr. Samantha Kelleher


Dr. Kelleher works in a consultative model, providing psychiatric consultation focusing on diagnosis and treatment recommendations-including psychopharmacologic and psychotherapeutic recommendations.

Dr. Kelleher completed medical school and psychiatry residency at the University of Manitoba in Winnipeg.  She has practiced psychiatry in British Columbia, Manitoba and Ontario. Her areas of interest include mood and anxiety disorders, eating disorders and post traumatic stress disorder.

Brittany Lorentz

Office Manager

Brittany is an aspiring clinical psychologist and the office manager at Guelph CBT. She is the first person you will see when you walk into our office. Brittany has an undergraduate degree in psychology and has worked with youth and adults with mental health difficulties and developmental disabilities. Brittany helps with all office inquires, from managing referrals, scheduling new and existing clients, and working behind the scenes to make sure that our office runs smoothly. She is onsite and available to help Tuesday through Friday from 9am to 1pm.