Mark Nelson began serving as the executive director of Three Rivers Collaborative in January of 2021.  Mark planted a faith community called Crossings in downtown Knoxville in 2007, and he served as lead pastor until he began his transition to TRC. In 2019 he co-authored Reframation: Seeing God, People, and Mission through Reenchanted Frames with Alan Hirsch. He serves on the boards of Forge America, Forge Global and Church Partners of the Smokies as well as being a part of the leadership of 100 Movements Publishing. Mark's wife, Dr. Monica Nelson, leads the pre-nursing program at Johnson University and they have three grown children.