Greg Koukl founded Stand to Reason in 1993 and currently serves as President. He has spoken on more than 90 university campuses both in the U.S. and abroad and has hosted his own call-in radio show for over 30 years, advocating for “Christianity worth thinking about.” He has debated atheist Michael Shermer on national radio and Deepak Chopra on national television. An award-winning writer and best-selling author, Greg has written seven books, including Street Smarts—Using Questions to Answer Christianity’s Toughest Challenges, The Story of Reality—How the World Began, How It Ends, and Everything Important that Happens in Between; Tactics—A Game Plan for Discussing Your Christian Convictions, and Relativism: Feet Firmly Planted in Mid-Air. Greg has been featured on Focus on the Family radio and has been interviewed for CBN and the BBC. He's been quoted in Christianity Today, the U.S. News & World Report, and the L.A. Times.

Greg received his Masters in Philosophy of Religion and Ethics at Talbot School of Theology, graduating with high honors, and his Masters in Christian Apologetics with honors from Simon Greenleaf University. He is an adjunct professor in Christian apologetics at Biola University.

Dr. Walter R. Strickland II is a professor, pastor, and a child of God committed to equipping believers to live with biblical wisdom by proclaiming and demonstrating the good news of Jesus Christ.

As a published author and instructor, he teaches in a variety of environments as a preacher, lecturer, consultant, and conference speaker. He has a passion for applying Scripture to all of life, exploring the African American Christian tradition, and living incarnationally.

Born in Chicago and raised in Southern California, he lives in the Raleigh area of North Carolina with his wife and their three children. They also cherish the hope of reuniting with their daughter, Hope, who is waiting for them in glory.

Mark Mittelberg is a bestselling author, international speaker, and the Executive Director of The Lee Strobel Center for Evangelism and Applied Apologetics at Colorado Christian University, where he helps equip believers through accredited degree programs and training resources. He is the author of Contagious Faith: Discover Your Natural Style for Sharing Jesus with Others and co-creator of the widely used Becoming a Contagious Christian course, which has equipped nearly two million people worldwide. His other works include Becoming a Contagious Church, Confident Faith (Outreach Magazine’s apologetics book of the year), The Questions Christians Hope No One Will Ask, The Reason Why Faith Makes Sense, and several collaborative projects with Lee Strobel, with whom he has partnered in ministry for more than thirty years. Formerly the evangelism director at Willow Creek Community Church and Executive Vice President of the Willow Creek Association, Mark holds an MA in Philosophy of Religion from Trinity International University and an honorary Doctor of Divinity from Southern Evangelical Seminary. He and his wife, Heidi, live near Denver and are the parents of Emma Jean and Matthew, both serving in ministry.