Jonathan Leeman (PhD, University of Wales) is the editorial director for 9Marks. He is the author or editor of over a dozen books and teaches at several seminaries. Jonathan lives with his wife and four daughters in a suburb of Washington, DC, and is an elder at Cheverly Baptist Church.

Andrew David Naselli (PhD, Bob Jones University; PhD, Trinity Evangelical Divinity School) is associate professor of systematic theology and New Testament at Bethlehem College & Seminary in Minneapolis, Minnesota, and an elder of Bethlehem Baptist Church. He has written several books and lives with his wife and four daughters in Minneapolis.