Fr. Walsh was ordained in 1967 in the Archdiocese of Washington. Following several pastoral assignments, he served as Pastor of St. Peter Claver Church in St. Inigoes, MD, from 1977 to 1986. He holds a Doctorate in Sacred Theology from the Pontifical John Paul II Institute in Rome and served as Professor of Dogmatic and Moral Theology at Blessed Diego Luis de San Vitores Theology Institute in Guam. Fr. Walsh is currently Spiritual Director at the Redemptoris Mater Seminary of the Archdiocese of Philadelphia.