Nicholas O'Neill was born in Cheltenham in 1970, and is an award-winning composer and musician. In 2012 he was awarded the American Guild of Organists Marilyn Mason Award for Organ Composition for his Festive Voluntary, he shared the Barbara Johnstone Composition Prize in 1995, won the Gregynog Young Composers' Award in 1993, and in 1992 he was unanimously awarded first prize in the Norwich Festival Composition Competition. He has been shortlisted for the William Mathias, Cornelius Cardew, Oare String Orchestra, Purcell and Vocalis composition awards.

In 2011 Nick was appointed Composer in Residence to the Parliament Choir in addition to his ongoing role with them as Chorus Master, and is the first composer to be associated officially with Parliament for nearly 500 years. In 2008 he became the first musician to be appointed Composer in Residence for the Academy of Saint Cecilia where he is also an Honorary Fellow and a member of the advisory panel. He is President of Cantores Salicium and Associate Director of Music at St. Mary Abbots, Kensington. He has lectured at Trinity College of Music, Birkbeck College, University of London, Central Saint Martins College of Art and Design, and Morley College. He has also held posts as Organist of Brighton College and St. George's Cathedral, Southwark and was Chorus Master of the Malcolm Sargent Festival Choir for over a decade.

Recently completed works include 1215: Foundation Of Liberty, a cantata commissioned to celebrate the 800th anniversary of the sealing of Magna Carta, Magnificat & Nunc Dimittis on Eb for Christ Church, Hampstead, and an orchestral setting of Te Deum Laudamus for the Parliament Choir. His music has been broadcast multiple times on television and radio, and his Missa Sancti Nicolai was the Mass setting for the live BBC1 broadcast of Midnight Mass in 2011. 2016 will include performances at Cadogan Hall, St. John's, Smith Square, Notre Dame de Paris and at the London Festival Of Contemporary Church Music.

By night Nick is keyboardist with rock band JEBO, who released their second album, Settle Up or Settle Down in 2012, described as 'genuinely ingenious...undeniably brilliant' by Venue magazine.