Stephen is a Senior Clinical Physiologist in Sleep at the Liverpool Sleep & Ventilation Centre, Aintree University Hospitals. He has been involved with sleep medicine & physiology in a clinical, research and academic capacity for over 19 years.  Having gained a PhD in “Age and Gender differences in Healthy Human Sleep” from the University of Surrey, he has continued to be an active member of the sleep fraternity and also acts as a technical assessor for United Kingdom Accreditation Service on the IQIPS scheme.