He teaches on subjects including the history of Christian thought, Christian mysticism, and transcendental Thomism. Fields has also taught at Santa Clara University, Saint Joseph’s University, and Fordham University and served as president of the Jesuit Philosophical Association. He is the author of Analogies of Transcendence: An Essay on Nature, Grace and Modernity (2016) and Being As Symbol: On the Origins and Development of Karl Rahner’s Metaphysics (2000), as well as numerous journal articles and chapters in edited books. Fields received degrees from Loyola College, Oxford University, Fordham University, and Yale University.