Joseph Tetlow, S.J. is the director of Montserrat Jesuit Retreat House, where he gives retreats, workshops, and writes. He spent several years in Rome as head of the Jesuit General's Secretariat for Ignatian Spirituality, guiding the efforts of 250 Jesuit retreat houses. He was also a professor of Theology at St. Louis University and an associate editor of America Magazine. He has served on the Board of Directors of SLU, the University of Seattle, and Harvard's Institute for Educational Management.

Fr. Tetlow has written numerous articles and books. Among them are Ignatius Loyola: Spiritual Exercises, Choosing Christ in the World, Making Choices in Christ, and a commentary on the full cycle of Sunday readings in America.