Cummins Institute for Catholic Thought, Culture and Action at Saint Mary's. He has also taught English at Bethlehem University and music at the Latin Patriarchal Seminary in Beit Jala, West Bank. Brother Donald staffed the Vatican's Apostolic Delegation to Jerusalem, directed the Jerusalem Office of the Pontifical Mission for Palestine and was the chief overseas operating officer for the Catholic Near East Welfare Association. As director of its United States Office in New York, he also was a consultant and permanent representative to the United Nations and UNICEF for the International Catholic Child Bureau. He has written numerous articles and been a frequent lecturer around the world on the Middle East.