Ronnie Martin is founder and lead pastor of Substance Church (EFCA) in Ashland, Ohio. Before pastoral ministry, Ronnie was an internationally known recording artist, producing and releasing over 15 albums for the Tooth and Nail Records label. In addition to pastoring Substance, Ronnie is also the Director of Leader Renewal for Harbor Network, a church planting collective based out of Louisville, Kentucky. He has authored 6 books, including The God Who Is With Us, and regularly speaks at conferences for pastors and church planters.

Donnie Griggs was born and raised in a small town called Morehead City, in coastal North Carolina, where he planted One Harbor Church. Donnie’s passion is to see churches in small towns and rural areas equipped and empowered to radically engage culture and make disciples. Because of this passion, in addition to leading One Harbor Church, Donnie also travels frequently in the United States and internationally to help strengthen and encourage other church leaders and planters. He is the author of Small Town Jesus, and he also serves on the leadership team of the Advance Movement of churches.

Collin Hansen es vice presidente de contenido y editor en jefe de Coalición por el evangelio. Es presentador del podcast Gospelbound y ha escrito y contribuido a muchos libros, el más reciente de ellos titulado Rediscovering church: Why the Body of Christ Is Essential. Ha publicado con el New York Times y el Washington Post y ofrecido comentarios en CNN, Fox News, NPR, BBC, ABC News y PBS NewsHour. Hizo trabajo de edición para Our Secular Age: Ten Years of Reading , Applying Charles Taylor y The New City Catechism Devotional, entre otros libros.  Es miembro de la City Church en Birmingham, Alabama y es profesor adjunto en la escuela Beeson Divinity, en donde también co-preside la junta asesora. Collin Hansen serves as vice president for content and editor in chief of The Gospel Coalition. He hosts the Gospelbound podcast and has written and contributed to many books, most recently Rediscover Church: Why the Body of Christ Is Essential. He has published with The New York Times and The Washington Post and offered commentary for CNN, Fox News, NPR, BBC, ABC News, and PBS NewsHour. He edited Our Secular Age: Ten Years of Reading and Applying Charles Taylor and The New City Catechism Devotional, among other books. He is a member of Iron City Church in Birmingham, Alabama, and he is an adjunct professor at Beeson Divinity School, where he also co-chairs the advisory board.