William Green is a pianist, conductor, and répétiteur. Born and bred in Yorkshire, he graduated with a First in Music from Christ Church, Oxford, in June 2013. He has a PhD from the University of Liverpool with a thesis on Richard Wagner's Der Ring des Nibelungen, having been awarded the prestigious Duncan Norman Research Scholarship in 2013. At the Junior Royal Northern College of Music he studied the piano with John Gough, and conducting with Dane Lam and Ewa Strusinska. He was a Young Artist Répétiteur 2018/19 at the National Opera Studio in London, and between 2019 and 2021 he was répétiteur at the International Opera Studio at Opernhaus Zürich.  William has been generously supported by Help Musicians UK and the Roderick Brydon Memorial Trust. In April 2019 he was the joint winner of the Help Musician's UK Accompanist's Prize at the Kathleen Ferrier Awards.

William has performed concertos with amateur and semi-professional orchestras. His repertoire includes concertos by Rachmaninoff, Brahms, Tchaikovsky, Mozart, Beethoven, and Ravel. In 2011-12 he was the conductor of the Oxford University String Ensemble, performing such works as Stravinsky's Apollon Musagète and Bartók’s Music for Strings, Percussion and Celesta. He conducted Christ Church College Orchestra for two years, performing symphonies by Beethoven and Brahms, concertos by Beethoven and Mendelssohn, and other works by Wagner, Debussy, and Stravinsky. In 2018 he was Assistant Music Director on Hampstead Garden Opera’s production of La traviata, and répétiteur on Stravinsky's The Rake's Progress with British Youth Opera. In July and August 2019 he assisted as a répétiteur on a performance of Berlioz's Benvenuto Cellini with the Orchestre Révolutionnaire et Romantique and the Monteverdi Choir, conducted by Sir John Eliot Gardiner, which included assisting at a performance at the BBC Proms.  In 2019 he was répétiteur on a production of Handel's Belshazzar at Opernhaus Zurich, conducted by Laurence Cummings. In 2021 he was assistant conductor and répétiteur on Donizetti's Viva La Mamma with the Zurich International Opera Studio. Since August 2021 he has been Solo-Korrepetitor at Luzerner Theater, being involved on productions of Verdi's Macbeth, Britten's The Rape of Lucretia, Pascal Dusapin's Perelà, and Mozart's Le Nozze di Figaro, in which he performed the recitatives from the fortepiano, earning him the epithet of "whirlwind at the Hammerklavier" from the Luzerner Zeitung (November 2021).