Qualified at the Middlesex Hospital Medical School, University of London in 1985 with merit in surgery.
Junior doctor training in adult medicine in London, obtaining the MRCP (UK) in 1988.
Dr Jacobs trained in paediatrics across London until taking up a four year lecturer post (Honorary Senior Registrar) at the University of Manchester. During this period Dr Jacobs submitted an MD thesis on the psychology of children's eczema. He then undertook a three year fellowship at the Hospital for Sick Children, Toronto, Canada from1996-1999. During this period he obtained an MSc in Clinical Epidemiology with a thesis on measuring the severity of influenza in children (CARIFS).
Dr Jacobs then returned to the UK as a locum consultant paediatrician in the NHS and in the Royal Naval Hospital Gibraltar.