Roger Sinclair Kirby FRCS(Urol), FEBU (born November 1950) is a British retired prostate surgeon and professor of urology.

Following his medical education and training at St John's College, Cambridge, and Middlesex Hospital, London, and with a distinction in surgery, Kirby took various surgical posts across England.

In the same year, he was both elected Hunterian professor with his lecture titled "The Investigation and Management of the Neurogenic Bladder", and appointed consultant urologist at St Bartholomew's Hospital, London.

His father was a professor of biochemistry and fellow of the Royal Society who worked as head of cell chemistry at what was then called the Chester Beatty Research Institute.

[3][5][6][7] Kirby's first house job was at the Cheltenham General Hospital, where he worked with surgeon Peter Boreham, who encouraged him to pursue the field of urology and particularly prostate disease.

[11] In 1985, Kirby spent five weeks at the Duke University Medical Center, North Carolina, USA, on a Royal College of Surgeons travelling scholarship.

[5][12] Earlier, as a research fellow at the Middlesex, he met Clare Fowler and together they published research articles on how nerves work to control the muscles used to control passing urine, work that formed the basis of both Fowler's future contributions to continence issues in people with neurological conditions, and Kirby's doctoral thesis.

[13] In the same year he gained his MD from Cambridge,[7] and was elected the Hunterian Professorship with a lecture titled "The Investigation and Management of the Neurogenic Bladder".

[16] In 1986, as the PSA test was coming into use, Kirby was also appointed consultant urologist at St Bartholomew's Hospital, London, and later took over from John Wickham.

[6][17] After watching American urologist Patrick C. Walsh at the Johns Hopkins University, Baltimore, perform open radical prostatectomies for prostate cancer, while simultaneously preserving pelvic nerves, he became a staunch advocate of the procedure.

[6] From 2005, the Centre therefore offered minimally invasive laparoscopic prostatectomy with a more holistic approach, advising on a wide range of men's health, including diet and exercise.

[35] Kirby married Jane Cooper, who edited Country Living magazine before working as the business manager at her husband's clinic.

[9] In The Prostate: Small Gland Big Problem, one section was written by Clive Turner, who had undergone a radical prostatectomy himself and subsequently counselled other men considering the same option.