Margaret Daly-Denton's early career was as an organist and composer with an academic and practical involvement in liturgy. Her "Alleluia, Amen: Music for the Liturgy", (1978) was a seminal resource, and her music for the Liturgy of the Hours is sung in monasteries worldwide. She served extensively on ICEL (International Committee on English in the Liturgy). More recently, her doctoral research at Trinity College Dublin on the early Christian reception of the psalms, was published as David in the Fourth Gospel (2 ). She has taught Bible and liturgy at various institutions in Ireland.