Walker has been Music Director of the Berkshire Youth Orchestra, The Purcell School Symphony Orchestra, The Norfolk Symphony Orchestra, the Northampton Symphony Orchestra, and is conductor for Musica Viva in Moscow.[17] He is Music Director of the Abingdon and District Musical Society. Walker teaches conducting at Trinity Laban Conservatoire of Music and Dance[18] and conducts the Sinfonia and Symphony Orchestra at the Junior Academy of the Royal Academy of Music,[19] as well as teaching conducting at the Royal Academy of Music.[20] He conducts the Surrey County Youth Orchestra.
Havergal Brian: Symphonies Nos. 22, 23, 24 / English Suite No. 1 (New Russia State Symphony, A. Walker) Naxos 2013
Havergal Brian: Symphonies Nos. 6, 28, 29 and 31 (New Russia State Symphony, A. Walker) Naxos 2015
Ignatz Waghalter: New World Suite / Mandragola: Overture and Intermezzo / Masaryk's Peace March (New Russia State Symphony, A. Walker) Naxos 2015
Robin Walker: Great Rock is Dead / Odysseus on Ogygia: Prelude / The Stone King / The Stone Maker (Novaya Rossiya Symphony Orchestra, A. Walker) Toccata Classics 2016
Arnold Griller: Ensemble Seventeen / Distant Villages / Concerto for Clarinet and Strings, Vol. 1 (Musica Viva, A. Walker) Toccata Classics 2017
Havergal Brian: Symphonies Nos. 8, 21, 26, (New Russia State Symphony, A. Walker) Naxos 2017
Arnold Griller: Scherzoid / Symphony / Introduction, Cakewalk and Allegro for piano and orchestra / Rhapsody Concertante, Vol. 2 (Musica Viva, Martirosian, A. Walker) Toccata Classics 2018
Havergal Brian: The Tinker's Wedding: Overture / Symphonies Nos. 7, 16, (New Russia State Symphony, A. Walker) Naxos 2019