Richard Miller trained at St Barts Hospital in London and after junior training posts in London moved to Luton and Dunstable and then to Bristol and Bath Hospitals as a registrar. He undertook his research into the continence mechanism and pelvic floor physiology in the Bristol Royal Infirmary on an MRC fellowship for 2 years. He was awarded the Patey Prize and a Hunterian Professorship for this research. He then worked in St Marks Hospital in London and was awarded several travelling fellowships to visit and continue research with Minnesota Colorectal group. He was appointed to Cambridge in January 1993.
Since then, having established a specialist colorectal practice, he has been involved in shaping all the surgical departments there into high specialised units which provide excellent outcomes as well as continuing research. He has been heavily involved in management since being appointed general surgical lead in Sept 1993. He ran ever larger groups culminating in Divisional Director of Surgery in 2008. He is currently one of the Deputy Medical Directors.