Dr. Ray Baker is the Director of HealthQuest, a health corporation offering assessment services, expert testimony, treatment planning, occupational health, disability management, research and vocational rehabilitation services to organizations and individuals. His main vocational focus is in working with corporations and organizations to improve the early detection, intervention and rehabilitation of personnel whose attendance, performance, behaviour or safety has been impaired by substance use disorders or other invisible disabilities including chronic pain syndromes.

Dr. Baker practised Family Medicine and Occupational Medicine in Logan Lake, B.C. from 1976 to 1986. He moved to the Lower Mainland to specialize in Addiction Medicine. Over the years, in the course of treating thousands of addicted patients and training many health professionals, he developed expertise in the management of invisible disabilities: substance use disorders (including nicotine dependence), chronic pain syndromes, stress-related emotional and functional impairment and various process addictions such as pathological gambling or compulsive sexual disorders. He has earned certification and was granted fellowship status in both Addiction Medicine and Family Medicine. He designed and implemented (and won a national award for) the Addiction Medicine curriculum at the University of British Columbia Medical School, directing the program for five years. He authored a chapter on Alcoholism for Conn's Current Therapy, 2002 edition.

Over the years he has provided expert testimony in a variety of venues including labour arbitrations, courtrooms, coroners' inquests, human rights tribunals and disciplinary hearings.