David obtained his MBBS, MRCP (UK) and FRCP (UK) from the University of London.
He trained at a number of hospitals in London and the South East, including St Bartholomew's Hospital, Guys Hospital London, and the Hammersmith Medical School. He held Registrar positions at Whipps Cross Hospital and the London Chest Hospital and was a Research Fellow at St Mary's Hospital.
He joined Ashford & St Peter’s in 1996 as a Consultant Cardiologist, and was instrumental in developing services such as the Rapid Access Chest Pain Clinics and trans-oesophageal echocardiography.
He has held the position of Consultant Cardiology at St George’s Hospital since 1996 and has been an Honorary Clinical Senior Lecturer at Imperial College of Science, Technology and Medicine since 2001, and Postgraduate Tutor from 2002 - 2006. He was the Clinical Lead on the West Surrey Cardiac Network, from 2005 to 2008.
He became the Clinical Director for Medicine in 2006, and was appointed to Deputy Medical Director in 2010, before being appointed to his current role of Medical Director in 2012. Dr Fluck was appointed Interim Chief Executive in January 2022.