J. Mack Stiles is the director of Messenger Ministries Inc, an organization that promotes healthy missions. Mack and his family lived in the Middle East for 20 years, where he was the founder and director of the Fellowship of Christian UAE Students (FOCUS) in the United Arab Emirates. He later served as the pastor for the Erbil Baptist Church in Iraq and worked for many years with InterVarsity Christian Fellowship in the United States. Mack is the author of Evangelism; Marks of the Messenger; and Speaking of Jesus.