Roderick Williams sings a wide repertoire, from baroque to contemporary music, in the opera house, on the concert platform, and in recital. He has performed in all the major opera houses in the United Kingdom and is particularly associated with the baritone rôles of Mozart. He has also sung world premières of operas by David Sawer, Sally Beamish, Michael van der Aa, Robert Saxton and Alexander Knaifel. Williams sings concert repertoire with all the BBC orchestras as well as the Bournemouth Symphony, London Sinfonietta, Philharmonia Orchestra, Royal Scottish National Orchestra, Deutsches Symphonie-Orchester Berlin, Russian National Orchestra, and Orchestre Philharmonique de Radio France, among many others. His festival appearances include the BBC Proms, Edinburgh, Cheltenham, Aldeburgh and Melbourne. Roderick Williams is also a composer and has had works performed at the Barbican Centre, the Purcell Room, and Wigmore Hall.