Derek David Bourgeois (16 October 1941–6 September 2017) was an English composer.

Derek Bourgeois was born in Kingston upon Thames in 1941. After receiving his university education at Magdalene College, Cambridge(honours degree and doctorate), Bourgeois spent two years at the Royal College of Music, studying composition with Herbert Howells and conducting with Sir Adrian Boult. From 1971 to 1984, Bourgeois was a lecturer in music at Bristol University, and director of the National Youth Orchestra from 1984 to 1993. In 1980 he began conducting the Sun Life Band (now the Stanshawe Band of Bristol), which was his introduction to brass bands. In 1994 Bourgeois was appointed Director of Music at St Paul's Girls School, London, a position previously held by a number of noted composers, including Gustav Holst and Herbert Howells. After retiring from this post in 2002 he and his wife settled in Mallorca.

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