Mark DeVries (MDiv, Princeton Theological Seminary) is the founder of Ministry Architects, a consulting team that assists churches in building sustainable youth ministries. He served for twenty-eight years as associate pastor for youth and their families at First Presbyterian Church in Nashville, Tennessee. He has trained youth workers on five continents and has taught courses or been a guest lecturer at a number of colleges and seminaries. DeVries is the author of and coauthor of and he has been a contributing writer for , and . In addition, his articles and reviews have been published in a variety of journals and magazines. He and his wife, Susan, have four grown children.
Annette Safstrom is a senior consultant, speaker, and trainer with Ministry Architects and has served in childrens ministry for over thirty years. She was recently director of a rapidly growing childrens ministry in Texas, and she has spoken for boththe Children's Pastors Conference and Groups KidMin Conference. After graduating from Bible college with a certification in childrens ministry, Annette earned a bachelor's degree in psychology from Texas A&M University and a masters in research psychology from Southern Methodist University. She and her husband, Kevin, have two children.