Jonathan Leeman (Ph.D., Wales) is an elder at Capitol Hill Baptist Church in Washington, DC and the editorial director for 9Marks. He edits the 9Marks series of books as well as the 9Marks Journal. He is also the author of several books on the church, including The Church and the Surprising Offense of God's Love. Jonathan lives with his wife and four daughters in suburban Washington.

Bobby Jamieson is a Ph.D. student in New Testament at the University of Cambridge. He previously served as assistant editor for 9Marks and is the author, most recently, of Going Public: Why Baptism Is Required for Church Membership (B&H, 2015). Jonathan Leeman (Ph.D., University of Wales), an elder at the Capitol Hill Baptist Church in Washington, DC, is the editorial director at 9Marks and is the author, most recently, of Don't Fire Your Church Members: The Case for Congregationalism (B&H, 2015).