Thomas G. Grenham SPS, Ph.D., is the Associate Dean for Student Affairs and Head of the Department of Pastoral Theology at the Milltown Institute, Dublin. He teaches courses on pastoral/practical theology, mission theology and ministry. He has broad experience in ministry, having worked in many parishes in different parts of the world. A member of St Patricks Missionary Society, Kiltegan, Co. Wicklow, he served as a missionary for many years among the Turkana of Kenya. He received his interdisciplinary Ph.D. in theology and education from Boston College, Massachusetts, in 2002 and a Masters in Pastoral Ministry at the same university. His publications include The Unknown God: Religious and Theological Interculturation (Peter Lang, 2005).