in Die Meistersinger von Nürnberg at Covent Garden. His performances have included; the title roles of Parsifal, Lohengrin at the Royal Opera House with Sir Antonio Pappano, Otello and Lohengrin at Houston Grand Opera, the title role in Verdi's Otello and Sergei in his Opera Australia debut in Lady Macbeth of Mtsensk, Florestan with Daniel Barenboim at the BBC Proms with the West-Eastern Divan Orchestra and made his Carnegie Hall debut as Caesar in Samuel Barber's Antony and Cleopatra for New York City Opera, returning with the Metropolitan Opera Orchestra and James Levine for Mahler's Das Lied von der Erde and sang in Beethoven's Missa solemnis with the Boston Symphony. O'Neill is the patron of the New Zealand Association of Teachers of Singing (Newzats), The New Zealand Opera School, the New Zealand Singing School, New Zealand Circle 100, the New Zealand Brass Foundation, St Kilda Brass, the Auckland Boys' Choir, the Ashburton MSA Choir, the Christchurch City Choir and the UK Singingworks. He appears on the 1998 New Zealand one-dollar performing arts postage stamp. In the 2017 Queen's Birthday Honours, O'Neill was appointed an Officer of the New Zealand Order of Merit for services to opera. O'Neill contributed as tenor soloist to the Deutsche Grammophon recording of Mahler's "Symphony No.8" with the Los Angeles Philharmonic conducted by Gustavo Dudamel. The recording received two nominations for the 2022 Grammy Awards for Best Choral Performance and Best Engineered Album in Classical. It won the Best Choral Performance Award. Recordings Distant Beloved Beethoven Schumann Strauss Wagner (Decca) Terence Dennis Mahler: Symphony No. 8 Deutsche Grammophon Los Angeles Philharmonic, Gustavo Dudamel Wagner: Wagnermania (NoMadMusic) Orchestre national d'Île-de-France, Case Scaglione Mahler: Symphony No. 8 Munich Philharmonic, Valery Gergiev Father and Son - Wagner Scenes and Arias (EMI) New Zealand Symphony Orchestra, Pietari Inkinen Wagner: Siegfried(Halle) The Hallé, Mark Elder Wagner: Siegfried(Naxos) Hong Kong Philharmonic, Jaap van Zweden Wagner: Parsifal (Opus Arte) The Royal Opera Covent Garden, Sir Antonio Pappano Wagner: Die Walküre (Arthaus Musik) Der Ring des Nibelungen Teatro alla Scala, Daniel Barenboim Verdi: Otello (LSO Live) London Symphony Orchestra, Sir Colin Davis Weber: Der Freischütz (LSO Live) London Symphony Orchestra, Sir Colin Davis Mahler: Symphony No. 8 (Phantom) Sydney Symphony, Vladimir Ashkenazy Beethoven: Symphony No. 9 Sony, Die Deutsche Kammerphilharmonie Bremen, Paavo Järvi Beethoven: Symphony No. 9 Analekta, Orchestre Symphonique de Montreal, Kent Nagano Martin: Der Sturm (Netherlands Radio Philharmonic Orchestra), Thierry Fisher Hyperion