Professor Williams is in the full-time practise of sleep medicine and has had a long interest in Sleep Medicine dating back to research conducted at Harvard University. Subsequently he was appointed at the University of California Los Angeles, rising to tenured Professor of Clinical Medicine and where he developed what was to become the largest sleep service within the Veterans Administration while at the same time co-directing the UCLA Sleep Disorders Centre. As sleep medicine gelled as a specialty, Professor Williams was one of the first to take the American Board examinations in 1989 to become an accredited polysomnographer and Fellow of the American Academy of Sleep Medicine.
On return to London to Direct the Lane Fox Respiratory Unit, an internationally recognised Centre of Excellence for non-invasive ventilation, he established the Sleep Disorders Centre at Guy’s and St. Thomas’ NHS Foundation Trust, now by far the largest and most active in the UK, in addition to his similar role at Queen Victoria Hospital.
Professor Williams has published widely in the field, is a Diplomat of the American Board of Sleep Medicine, European Somnologist (Certified by the European Sleep Research Society), a founding member and Past President of the Sleep Medicine Section of the Royal Society of Medicine and was awarded the UK’s first Chair in Sleep Medicine at Kings College, London, UK.
Professor of Sleep Medicine, King's College London Consultant Physician, Queen Victoria NHS Foundation Trust, East Grinstead. Chief Medical Advisor, Circadia Health Past Clinical Director, Lane Fox Respiratory Unit [1995-2015] and Sleep Disorders Centre, [1995-2020] Guy’s and St Thomas’ NHS Foundation Trust, London Past Director, Pulmonary, Intensive Care and Sleep Medicine, VA Greater Los Angeles and Professor of Clinical Medicine, UCLA, 1976-1995.