Dr. Sieberhagen serves as associate professor of Islamic studies and director of the master of arts in Islamic studies program. Prior to his service at Southwestern, Dr. Sieberhagen was an IMB missionary in central Asia for over a decade. He is passionate about training others to reach the unreached peoples of the world with the gospel.
 
Dr. Sieberhagen has contributed a chapter on “Church and Culture” for a forthcoming book on Church Revitalization. Dr. Sieberhagen is a member of the Evangelical Theological Society and has presented at the national conference. He has contributed book reviews for the Southwestern Journal of Theology, and he contributes regular blog posts to “Theological Matters” on the Southwestern Baptist Theological Seminary’s website.
 
Dr. Sieberhagen and his family are members of Hulen Street Church. He was and remains an active sportsman, having played soccer, rugby, tennis, cricket and golf at a competitive level.