John Warwick Montgomery is considered to be one of the foremost living apologists for classical, biblical Christianity. A renaissance scholar with a flair for controversy, he lives in France. Dr. Montgomery is the author of more than sixty books in six languages. He holds eleven earned degrees, including a Master of Philosophy in Law from the University of Essex, England,

Dr. Steven A. Hein serves as Director of the Concordia Institute for Christian Studies, an organization that offers auxiliary educational services to Christian gatherings across the country and the leadership of Lutheran Churches in West Africa. Dr. Hein also serves as an affiliate professor of theology at Concordia University, Chicago and the Institute of Lutheran Theology. He is the author of, "Christian Life: Cross or Glory?" and "You Can Give an Answer: A Study in Christian Apologetics."

John T. Pless (D. Litt, Concordia University, Chicago) is Assistant Professor of Pastoral Ministry and Missions and Director of Field Education at Concordia Theological Seminary in Fort Wayne, Indiana.

Dr. Uwe Siemon-Netto is a lay theologian and internationally-renowned journalist. He was born in Leipzig, Germany. He is the former religion editor of United Press International. In mid-career, at age 50, he began his theological studies. He studied for his M.A. in theology at the Lutheran School of Theology in Chicago. His Ph.D. in theology and sociology of religion is from Boston University. He is the author of several books, including "The Fabricated Luther."

Mark Mattes is associate professor of religion and philosophy at Grand View College in Des Moines, Iowa. He is the author of "Martin Luther’s Theology of Beauty," "The Role of Justification in Contemporary Theology," "Imaging the Journey," and "Law and Gospel in Action."

Professor Steven Paulson is a Senior Fellow in Residence at 1517. He holds degrees in theology from St. Olaf College, Luther Seminary and has a Doctorate from the Lutheran School of Theology in  Chicago.  He has taught at Concordia College, Moorhead, Luther Seminary, St. Paul, and Luther House of Study of Sioux Falls.  He is the author of many articles and books, including three volumes of Luther's Outlaw God that launched his podcast "Outlaw God." He has added a new podcast for preaching from the lectionary called "Preaching the Text."

Robert Kolb (PhD, University of Wisconsin) is mission professor of systematic theology emeritus at Concordia Seminary in St. Louis, Missouri. He is the author and co-author of numerous books.