Following graduation from Western University with an Honours Specialization in Kinesiology, Dr. Marshall pursued a Doctor of Chiropractic degree from the Canadian Memorial Chiropractic College in Toronto, Ontario. Dr. Marshall then went on to complete a two-year post-doctorate residency in Sports Sciences to receive specialized training and designation in the diagnosis and management of sports-related injuries, particularly on the focus of concussions and concussion treatment. Dr. Marshall has been the keynote speaker at several concussion conferences and continuing education seminars and his works have been published in various medical journals.

Dr. Marshall is the founder and current president of Complete Concussion Management Inc., a multidisciplinary network of clinics across Canada devoted to providing evidence-based concussion care to athletes and concussed patients. Dr. Marshall brings his expertise in concussion treatment and rehabilitation as well as his passion for helping those with mild traumatic brain injuries receive appropriate care.