Dr. Fesko is a minister in the Orthodox Presbyterian Church and Harriett Barbour Professor of Systematic and Historical Theology at Reformed Theological Seminary, Jackson, Mississippi. He initially served as a church planter from 1998 until 2004 when the church particularized and called him as their pastor. He served as pastor of Geneva Orthodox Presbyterian Church from 2004 until 2009 when he was called to serve as Academic Dean and Professor of Systematic and Historical Theology at Westminster Seminary California until June of 2019. Dr. Fesko's research interests include the integration of biblical and systematic theology, soteriology, and early modern Reformed theology. Dr. Fesko’s publications include, Reforming Apologetics, Romans: Lectio Continua, The Spirit of the Age, Death in Adam, Life in Christ, The Trinity and the Covenant of Redemption, The Covenant of Redemption, The Theology of the Westminster Standards, Songs of a Suffering King, and Beyond Calvin: Union with Christ and Justification in Early Modern Reformed Theology, among many others. His scholarly essays have appeared in various books and journals including Perichoresis,  Reformed Theological Review, Journal of Reformed Theology, Church History and Religious Culture, Calvin Theological Journal, Trinity Journal, Journal of the Evangelical Theological Society, and the Westminster Theological Journal.

Dr. Fesko and his wife, Anneke, have three children and reside in a suburb of Jackson, Mississippi.