Dorian was born into a musical family and began playing the trumpet at the age 6. Having achieved Grade 8 by the age of 14, he went on to study in London at the Royal College of Music Junior Department for two years and then Trinity College of Music for a further three years. Since leaving music college in 1988 Dorian has worked as a professional freelance trumpet player, performing a diverse range of music including classical, jazz, salsa, pop, blues, funk, mariachi and other World music. Performance credits include:

Frank Sinatra
Shirley Bassey
Neil Diamond
Jamie Cullum
The Temptations
The Drifters
Pendulum Jazz Orchestra backing international jazz artists including Kenny Wheeler; Gerard Prescencer; Stan Sulzman and Ben Castle.

Dorian is now a full-time composer/arranger and has his own studio, based in West Yorkshire.