Geraint Bowen was born in London and received his early musical education as a chorister at Hampstead Parish Church under Martindale Sidwell. After studying the organ with Christopher Herrick he became organ scholar at Jesus College, Cambridge, later studying with John Scott and Stephen Cleobury; on leaving Cambridge he held posts as assistant organist at St Patrick's Cathedral, Dublin and Hereford Cathedral.

From 1995 to 2001 he was organist and master of the choristers at St Davids Cathedral, Pembrokeshire, and artistic director of the St Davids Cathedral Festival.

In 2001 he took up the posts of organist and director of music at Hereford Cathedral, conductor of Hereford Choral Society and artistic director of the Hereford Three Choirs Festival. His work with the cathedral choir has included a CD recording of works by William Byrd, radio and television broadcasts, four tours of the USA and the introduction of an annual Holy Week performance of one of J S Bach's Passions. The choir was recently featured in two editions of the BBC's Songs of Praise from Hereford, and its most recent recording, a CD of works by Herbert Howells, was released in 2009.

He has visited the USA several times to direct choral workshops and courses, and at the Three Choirs Festival he has worked with many of the country's leading orchestras, including the Bournemouth Symphony Orchestra, the City of Birmingham Symphony Orchestra, the Philharmonia Orchestra and the Royal Philharmonic Orchestra.