The Reverend John Hunwicke was for nearly three decades at Lancing College; where he taught Latin and Greek language and literature, was Head of Theology, and Assistant Chaplain. He has served three curacies; been a Parish Priest once and Senior Research Fellow at Pusey House in Oxford. Most recently he was priest-in-charge of St. Thomas the Martyr Church in Oxford, a historic Anglo-Catholic church that was in the forefront of the Oxford Movement, from the revival of vestments and incense to ministering to the urban poor.

On Ash Wednesday, 2011, he, with many of his parishioners, entered a period of preparation in order to be received into full communion with the Catholic Church. He is among those former Church of England clergy who is preparing for ordination to the Sacred Priesthood of the Catholic Church via the Ordinariate of Our Lady of Walsingham.