Mary Lou McDonald Galvin has served at Holy Trinity Church, specifically as director of the Sunday 5:30 evening liturgy, since 1990.  This caps over thirty years of service as a minister of music.  Mary Lou has been teaching music at Holy Trinity School for thirteen years.  A graduate of Chestnut Hill College, Philadelphia, with a B.A. in music and history, Mary Lou also holds a M.M. of Accompaniment and Chamber Music from The Catholic University of America, specializing in vocal accompaniment. She holds a certificate in Liturgical Studies from the Georgetown University and Georgetown Center for Liturgy, Spirituality and the Arts and has completed graduate courses in Vocal Accompaniment at Westminster Choir College in Princeton, NJ.