Mark Hart serves full time as executive vice president of Life Teen, a Catholic youth ministry movement currently being implemented in 1,800 parishes in 30 countries worldwide. A graduate of the University of Notre Dame, Mark is a best-selling author of over a dozen books, popular speaker, and SiriusXM radio host. His wildly popular DVD study series, Altaration, Encounter, and T3 are currently utilized in homes, youth groups, and classrooms across the globe. Mark and his wife, Melanie, have three daughters, Hope, Trinity, and Faith, and one son, Josiah. They live in Phoenix, Arizona.