Warren Bird, an ordained minister, is the research director at Leadership Network. He has conducted numerous interviews and surveys on topics of church restarts, church planting, multisites, and mergers, and is coauthor of more than twenty books, including Culture Shift, Viral Churches, and The Other 80 Percent.
Leonce B. Crump Jr. is the founder and senior pastor of Renovation Church in Atlanta, a member of the Acts 29 church-planting network. A former NFL football player, he is also the author of Renovate.
Ryan T. Hartwig currently serves as provost and vice president of academic affairs at Vanguard University in Costa Mesa, California. He is also the author of Teams That Thrive (with Warren Bird) and Leading Small Groups That Thrive.