Fr. Joce is the Head of the Commission on Extraordinary Phenomena for the Archdiocese of Manila. He is the Director of the Archdiocese of Manila Office of Exorcism, an exorcist of Manila for 12 years now, and a member of the International Association of Exorcists based in Rome. He completed the Vatican Course on Exorcism and Deliverance at the Regina Apostolorum Pontifical University. He is the author of the bestselling book Exorcism—Encounters with the Paranormal and the Occult (Shepherd’s Voice Publications), as well as Exorcist: Volume 1—A Spiritual Journey and Exorcist: Volume 2—Spiritual Battle Lines published by ST PAULS. He is also a full-time formator, spiritual director, and professor of spirituality and psychology at the San Carlos Major Seminary.