Gerard Thomas Gillen (born 16 August 1942) is one of the most prominent Irish organists and a Professor Emeritus in Music at Maynooth University. As an organist, he has performed globally and recorded several CDs. Gillen's research interests lie in the areas of Catholic church music, organ building, and performance practice. Education Gillen was born in Dublin and came in contact with organ playing through John Clery, organist of the Franciscan Church of the Immaculate Conception on Merchant's Quay, Dublin. He studied piano at the Municipal School of Music, Dublin, with Elizabeth Costello and organ with William Sydney Greig. Having won an entrance scholarship, Gillen graduated with first-class honours from University College Dublin (UCD). With a travelling scholarship from the Arts Council of Ireland he was able to pursue further organ studies at Antwerp, Belgium, with Flor Peeters, a time during which he met Marcel Dupré, Maurice Duruflé and Olivier Messiaen. He returned in 1966 for postgraduate studies at the Royal Conservatoire Antwerp, gaining a "Prix d'Excellence". He subsequently went to Queen's College, Oxford for postgraduate research studies, where he also graduated BLitt with research on 17th-century keyboard music. In 1992, the University of Oxford elected Gillen a John Betts Fellow. Appointments On his return to Ireland in 1969, Gillen was appointed lecturer in music at UCD. He moved on to St Patrick's College, Maynooth (now Maynooth University) in 1985, occupying the Chair of Music until his retirement in April 2007. He oversaw the expansion of the music department in undergraduate and postgraduate programmes, also teaching performance studies and musicology, including new diplomas in Music Technology and Church Music. He also directed the university's choral society. He oversaw the development of the department from one of the smallest in Ireland to one of the largest in the British Isles. He remains Professor Emeritus there. From 1976 to 2018, Gillen was the Titular Organist of St. Mary's Pro-Cathedral, Dublin, retiring after 42 years of service. Since 1993 he has been chair of the Irish Episcopal Commission's Advisory Committee on Church Music. As a musicologist, Gillen is general editor (with Harry White of UCD) of the book series Irish Musical Studies. Gillen's organ pupils include Gerald Barry, John O'Keeffe, Shane Brennan, Peter Sweeney, Andrew Synnott, and others. Academic honours In the course of his long career, Gillen has received numerous awards and honorary titles including Austrian Decoration for Science and Art, Officer