Justin is a pastor at Mars Hill Church and Director of the Resurgence. He is also an adjunct professor of theology at Reformed Theological Seminary. He holds two masters degrees from Reformed Theological Seminary and a PhD from Emory University.

Justin and his wife, Lindsey, wrote Rid of My Disgrace, a Re:Lit book on gospel hope and healing for sexual assault victims.

His edited volume, Christian Theologies of Scripture, explores various views of the authority and nature of Scripture throughout the Christian tradition.

Since 2001, Justin has traveled to southern Sudan to teach chaplains in the Sudanese People's Liberation Army. Justin and Lindsey founded and direct Mosaic, which is a non-profit organization that initiates projects in southern Sudan and Uganda that serves those who are suffering in these areas.