Dr. Hannah Marchand

Dr. Marchand is the founder of Compass Mental Health.

A registered clinical psychologist with the College of Psychologists of Ontario,

Dr. Marchand works with patients in the health, peak performance and sport psychology domains.

Dr. Marchand’s approach to psychological assessment and treatment is integrative and collaborative. She focuses on empowering patients to use their individual strengths and expertise in their own lives. This is done within evidence-based treatments to facilitate change.

Dr. Marchand tailors treatment to the specific needs and goals of the patient.

The Team

Dr. Alina Protopopescu


Dr. Alina Protopopescu is a Clinical Psychologist in Supervised Practice under the supervision of Dr. Hannah Marchand. She completed her Ph.D. at McMaster University in 2020 and her pre-doctoral Psychology Residency at St. Joseph’s Healthcare Hamilton in the Mood Disorders Program, the WSIB Specialty Clinic, and the Pain Clinic.

Dr. Protopopescu offers assessment and treatment for adults with a range of concerns, including trauma, mood and anxiety disorders, and chronic health conditions (e.g., chronic pain, insomnia, women’s health). She works from an evidence-based approach, including therapies such as cognitive behavioural therapy, acceptance and commitment therapy, mindfulness-based cognitive therapy, and motivational interviewing. She is committed to providing compassionate and client-centred care. 

Her doctoral work focused on the relationship between posttraumatic stress disorder, moral injury, and various psychiatric symptoms. Her research more specifically focused on and how these symptoms impact treatment outcomes in military personnel, veterans, and public safety personnel. 

Katherine (Kat) Fretz

Kat Fretz (MSc) is a PhD candidate in the doctoral clinical psychology program at Queen's University. She provides assessment and treatment under the supervision of Dr. Marchand.


Her current research focuses on exploring the impact of psychological factors on disability among individuals with inflammatory bowel disease (IBD). Kat has a passion for working with a diverse range of patients and has various experience treating patients with anxiety, depression, and insomnia using Cognitive Behavioural Therapy. She has a particular interest in health psychology, which focuses on the intersection between mental and physical health among individuals with chronic health concerns. Kat is keen to bring her knowledge of this area into her clinical work at Compass Mental Health

Valentina (Tina) Mihajlovic


Ms. Valentina (Tina) Mihajlovic, MSc., is currently completing her PhD in Clinical Psychology at Queen’s University. She is currently working under the supervision of Dr. Marchand. Tina is extensively involved in research in the Queen’s University Pain Lab. Tina’s research interests lie within the field of health psychology, with a focus on chronic pain in the workplace. Her clinical practice is tailored to the patient and it encompasses using both Cognitive Behavioural Therapy and Acceptance and Commitment Therapy to meet patients’ goals and therapeutic needs.