Dorian studied at the Guildhall School of Music before carving out a career on the London Jazz scene, playing with Phil Bent, Alan Barnes, Dave O'Higgins, Phil Robson, Dick Pearce, Clare Hirst, Don Weller, Chris Tobin etc. He taught bass guitar for five years at Morley College in London and led jazz workshops at Kingsway and Camden institute. In 1995 he helped organise the London Jazz Festival for JazzUmbrella, and recently ran a jazz club in south London for G.E. Aldwinkles. This has now transfered to the Bedford pub in Balham, under the title  "Jazz in the Round".