In 1952, Dubay became a seminary professor and a spiritual director at Notre Dame Seminary in New Orleans, Louisiana. He then began teaching at the Marist College in Washington DC, while completing his doctoral work at The Catholic University of America, before returning to the faculty of Notre Dame Seminary for eleven more years. Over the next ten years, Dubay served at a number of Catholic institutions. In 1967 he moved to Bettendorf, Iowa, where he taught at the Marist seminary located in the Joseph F. Bettendorf House. In 1968 he moved to Burlingame, California, where he had been invited to teach with the Sisters of Mercy at Russell College. After two years, he joined the faculty at Chestnut Hill College in Philadelphia, Pennsylvania. Then, in 1973, he moved back to Washington, D.C. to continue teaching at the Marist seminary. During this latter assignment Dubay was able to concentrate on his religious writing.
Itinerant ministry
In 1977, at the recommendation of his provincial superior, Dubay began traveling frequently to assist religious communities respond to teachings of the Second Vatican Council. He worked with many groups of religious sisters in renewing their constitutions. During this period, he began to answer invitations to speak and lead retreats throughout the world, including at parishes, seminaries, cloistered monasteries, lay associations, religious orders, hermitages, and even prisons. He formed close relationships with a number of religious communities, including the convents of the Missionaries of Charity, Carmelite sisters, Dominican sisters, Passionist Sisters, and the Sisters of Life. Dubay also began ministering through television and radio appearances. In 1988, he first appeared on EWTN Global Catholic Network as a guest on Mother Angelica Live. Dubay visited on EWTN at Irondale, Alabama at least once a year for over 20 years to record various series on topics including contemplative prayer, community life, and St. John of the Cross. He also spoke on various Catholic radio programs, including WEWN.
In 2008, Dubay was diagnosed as having early stages of bladder cancer. He began chemotherapy and radiotherapy, which after several months successfully induced remission. He was forced, however, to cancel all of his travel engagements, some of which had planned for several years. He chose to remain with the Marist community in Washington, D.C., and began to serve local parishes and high schools with spiritual direction, counseling, and lecturing. In 2009 he was moved to a nearby nursing center run by the Little Sisters of the Poor in Washington, DC. In early September 2010, in order to receive onsite dialysis, he was moved to a nursing care center in Silver Spring, Maryland. He was taken to Holy Cross Hospital on September 25, and died the following day. He was buried on October 7 in Washington, DC.
Personal life
Dubay was known for his scientific curiosity. He would read the monthly publications of Discover and National Geographic cover to cover. His 1999 book, The Evidential Power of Beauty: Science and Theology Meet, describes the wonder, symmetry, and intricacy revealed by science.
Selected works
Caring: A Biblical Theology Of Community
Happy Are you Poor: the Simple Life and Spiritual Freedom
Faith and Certitude
Fire Within: St. Teresa of Avila, St. John of the Cross, and Gospel, on Prayer
Seeking Spiritual Direction: How to Grow the Divine Life Within