An exceptionally popular speaker and teacher, Hahn has delivered numerous talks nationally and internationally on a wide variety of topics related to Scripture and the Catholic faith.  Over 500 of these talks have been produced in audio and video formats by St. Joseph Communications.  These talks have been effective in helping thousands of Protestants and fallen away Catholics to embrace the Catholic faith.

A profound author of many books, Hahn received his Bachelor of Arts degree with a triple-major in Theology, Philosophy, and Economics from Grove City College, Penn., in 1979, his Masters of Divinity from Gordon-Conwell Theological Seminary in 1982, and his Ph.D. in Biblical Theology from Marquette University in 1995.  He has ten years of youth and pastoral ministry experience in Protestant congregations (in Pennsylvania, Ohio, Massachusetts, Kansas and Virginia) and is a former Professor of Theology at Chesapeake Theological Seminary.  He was ordained in 1982 at Trinity Presbyterian Church in Fairfax, Va.  He entered the Catholic Church at the Easter Vigil, 1986.