Our Team
Marinus Du Preez
Principal Clinician
With advanced training in musculoskeletal care and a research spotlight on whiplash, Marinus is a clinician who tackles complex pain—especially headaches, migraines, and neck issues—with confidence and care.
He blends sharp clinical insight with a down-to-earth, whole-person approach that gets to the root of the problem. Patients appreciate his mix of precision, warmth, and a no-nonsense commitment to long-term results.
Outside the clinic, he’s all about mountain trails, long runs, and quality time with the people who matter most.
Haeley Kan
Associate Headache Clinician
Hailing from Canada, Haeley’s dedication to understanding and treating headaches is deeply personal, rooted in his childhood experiences witnessing his mom’s frequent attacks.
This emotional connection has strengthened his commitment to collaboratively work with patients, seeking a long-term, medication-free solution for persistent headaches and migraines.
Having lived in four different countries, Haeley brings a compassionate yet well-rounded approach to delivering evidence-based care and aiding patients in achieving their goals.
Bertrand Doeuk
Director
As the founder and Director of the Australian Headache and Migraine Clinics, Bertrand Doeuk is a trailblazer in the field of headache and migraine treatment. Known for his patient-focused care and clinical expertise, Bertrand has earned a reputation for delivering exceptional results to those in need.
A Certified Watson Headache® Practitioner, Bertrand has achieved the prestigious Level 4 Clinical Facilitator designation under Dr. Dean Watson’s guidance. This role places him at the forefront of training and mentoring Watson practitioners, ensuring the highest standards of care at the Australian Headache and Migraine Clinics.
Larissa Müller
Trainee Practice Manager
Larissa is the Trainee Manager at Sydney Headache and Migraine Clinic, bringing over five years of experience in the Healthcare and Wellness industry. Originally from Brazil, she is known for her empathy, problem-solving skills, and love for connecting with people—whether through her work, family time, or sharing her passion for great food, travel, and movies.
Niki Dhinaharan
Administrator
Nikita is one of our amazing receptionists at the Sydney Headache and Migraine Clinic. Niki approaches people with a friendly face and a positive attitude, which we are lucky to experience at our Sydney clinic. As a current Physiotherapy Student, she is able to use her physiotherapy skills and knowledge to better interact with patients. On top of this, Nikita loves to interact with people, and strives to ensure all patients feel at ease once entering our clinic.
