Since January 2017, he has held the post of Informator Choristarum, Organist and Tutorial Fellow in Music at Magdalen College, Oxford.
[2] He was Assistant Organist at St Paul's Cathedral from 2000 to 2006, and between 2009 and 2016 held the position of Director of Music at Jesus College, Cambridge.
Williams was organ scholar at Trinity College, Cambridge from 1997 to 2000, under Richard Marlow.
[5] His other conducting roles include Principal Guest Conductor of the City of London Choir, and Artistic Director of the International William Byrd Festival.
[5][11] In 2013 he organised a tour of India by the choir of Jesus College, Cambridge, which included a week working with Songbound in the slums of Mumbai.