Dr Field served was an officer in the British Army before entering the Medical College of St. Bartholomew's Hospital, London, where he gained a first class BMedSci and graduated in medicine with distinction.  After specialist training in diabetes and endocrinology at Guy's and St. Thomas' hospitals, he joined the laboratory of Professor Sir Steve Bloom at Imperial College London as a UK Medical Research Council clinical research training fellow and was awarded a PhD for research into the neuroendocrine control of appetite, energy expenditure and insulin secretion.

Dr Field combines his role as honorary consultant endocrinologist at Surrey and Sussex Healthcare NHS Trust with that of Clinical Reader in diabetes and endocrinology at the University of Surrey, where he is involved in research and teaching and is the University’s Caldicott Guardian.  He is also a Training Programme Director for Health Education England in the Kent, Surrey and Sussex Deanery, overseeing postgraduate medical education for Internal Medicine trainees in hospitals across the region.  In addition, as the National Institute for Health Research (NIHR) Clinical Research Network specialty lead in Kent, Surrey and Sussex for diabetes and for metabolic and endocrine disorders, he facilitates regional clinical research provision and is a member of two national specialty group committees.

Dr Field contributes to the acute unselected internal medicine rota at East Surrey Hospital and provides appointments at the Earlswood Centre, the Trust’s community-based outpatient hub for specialist diabetes and endocrinology services, which he helped to establish, and in the Aldrich-Blake Unit at East Surrey Hospital.  His clinical interests include structured education in type 1 diabetes mellitus, intensification of insulin treatment, diabetes technologies including insulin pumps, glucose sensors and closed loops (the “artificial pancreas”), complex type 2 diabetes mellitus, diabetic foot disease, obesity, polycystic ovary syndrome, pituitary diseases, thyroid, parathyroid and adrenal gland disorders.