Bobby Jamieson (PhD, University of Cambridge) is an associate pastor of Capitol Hill Baptist Church in Washington, DC. Most recently, he is the author, with Tyler Wittman, of Biblical Reasoning: Christological and Trinitarian Rules for Exegesis (Baker Academic, 2022).

Jonathan (@JonathanLeeman) edits the 9Marks series of books as well as the 9Marks Journal. He is also the author of several books on the church. Since his call to ministry, Jonathan has earned a master of divinity from Southern Seminary and a Ph.D. in Ecclesiology from the University of Wales. He lives with his wife and four daughters in Cheverly, Maryland, where he is an elder at Cheverly Baptist Church.

​Mark Dever is the senior pastor of Capitol Hill Baptist Church in Washington, D. C., and the President of 9Marks. You can find him on Twitter at @MarkDever.