Featured Speakers

J. Warner Wallace

J. Warner Wallace is a cold-case homicide detective, popular national speaker and best-selling author. He serves as a Senior Fellow at the Colson Center for Christian Worldview, is an adjunct professor of apologetics at Biola University and a faculty member at Summit Ministries. He was a conscientious and vocal atheist until the age of thirty-five, when he took a serious and expansive look at the evidence for the Christian Worldview and determined that Christianity was demonstrably true. After becoming a Christ follower in 1996, Jim continued to take an evidential approach to truth as he examined the Christian worldview. He eventually earned a Master’s Degree in Theological Studies from Golden Gate Baptist Theological Seminary.

Sean McDowell

Dr. Sean McDowell is a gifted communicator with a passion for equipping the church, and in particular young people, to make the case for the Christian faith. He connects with audiences in a tangible way through humor and stories while imparting hard evidence and logical support for viewing all areas of life through a Biblical worldview. Sean is an Associate Professor in the Christian Apologetics program at Biola University. And he is the Resident Scholar for Summit California.  He is an author of over eighteen books and co-authored books with his father, Josh McDowell.

Dennis McCallum

Dennis McCallum is a lead pastor and director of the Xenos campus ministry. A graduate of Ashland Theological Seminary, Dennis has authored several books, including Discovering God, Walking in Victory, Members of One Another, and co-authored Organic Discipleship. Dennis and his wife, Holly, have three children.


James Rochford

James Rochford is a lead pastor at Xenos Christian Fellowship. He graduated Magna Cum Laude from Trinity Evangelical Divinity School with his Masters in Theological Studies and is the author of Too Good To Be True?, Endless Hope or Hopeless End, and Evidence Unseen. James and his wife, Duyen, also lead a Bible study for college students near OSU. They have two sons.


Jim Leffel

Jim Leffel Bio PictureJim Leffel is an elder, senior sphere leader and teacher of our Sunday night Central Teaching. Jim publishes essays on Christianity and contemporary culture, and speaks at university, missionary and church groups. He earned degrees in philosophy at the Ohio State University and Trinity Evangelical Divinity School. Before assuming his current responsibilities at Xenos, Jim taught philosophy at Trinity Evangelical Divinity School, Columbus State Community College and Ohio Dominican University. He and his wife, Linda, lead a home group and have two children.