Offices of The Master's Seminary
Board of Directors
Scott Ardavanis
Board Member
Scott Ardavanis is the Senior Pastor of Grace Church of the Valley in central California. Scott began his pastoral ministry at Grace Community Church with John MacArthur and also spent seventeen years as a senior pastor in Chicago and California. He is an adjunct professor at The Master’s Seminary. Scott is a featured speaker at Bible and pastors conferences around the world. He also serves as a board member for Sufficiency of Scripture Ministries, which impacts lives in Uganda with sound Biblical teaching. Scott earned his degrees at Los Angeles Baptist College (now TMU), B.A., The Master’s Seminary, M.Div., and Trinity Evangelical Divinity School, D.Min. Scott and his wife, Patty, have been married 35 years and have 7 children and 9 grandchildren. Scott has served on the board since 2017.
Brad Armstrong
Board Member
Brad Armstrong is a businessman who lives in Thousand Oaks, CA. He has served on the board since 2015.
Nathan Busenitz
Board Member
Dr. Nathan Busenitz teaches historical theology at The Master's Seminary, where he previously served as Senior Vice President and Dean of Faculty. Raised at Grace Community Church, he was trained in expositional ministry by his pastor, John MacArthur, and by his father, Irv Busenitz, an original TMS faculty member. He earned his B.A. from The Master's University and his M.Div., Th.M., and Ph.D. from The Master's Seminary. He is the author of several books, including Long Before Luther, Reasons We Believe, and Living a Life of Hope. He and his wife, Beth, have four children. Nathan joined the TMUS board in 2026.
Abner Chou
Board Member
Dr. Abner Chou began teaching at The Master's University in 2004 and continues to teach both at the university and seminary. He has served as the TMUS President since 2021.
Peter Coeler
Board Member
Peter Coeler is the owner of PAC Properties, a private real estate company in the San Fernando Valley. He is a graduate of The Master’s University, where he played basketball. He currently serves on the boards of Grace To You, the John MacArthur Charitable Trust, and Legacy Christian Academy.
Luis Contreras
Board Member
Luis graduated from The Master’s University and Seminary (B.S., M.Div., Th.M., D.Min.), was ordained and sent by Grace Community Church (GCC) as a missionary to Mexico City, where he served as a professor at Word of Grace Biblical Seminary (a TMAI school) and as pastor-teacher of Iglesia Cristiana de la Gracia. He has worked in Spanish translation for Grace To You since 1996 and helped translate the MacArthur Study Bible into Spanish. He co-pastors the Spanish-speaking fellowship group at GCC and serves GCC missionaries, with a focus on Ibero-America. He is an adjunct faculty member of TMS in Spanish, SEPE (TMAI Honduras), and Berea (TMAI Spain). He is married to Robin (a TMU alumna), and they have three children—Olivia, Rodrigo, and Ana (current students at TMU).
Matt S. Gilbert
Board Member
Matt Sakiestewa Gilbert is Head of American Indian Studies and Professor of History at the University of Arizona. After graduating from The Master’s University in 1999, Matt received an M.A. in theology from Talbot School of Theology, and an M.A. and Ph.D. in history from the University of California, Riverside. He has published extensively on American Indian education and sport. He and his wife Kylene—also a TMU alum—have four children. Matt joined the TMUS board in 2021.
Bryan Hughes
Board Member
Bryan Hughes is the Senior Pastor of Grace Bible Church in Bozeman, MT, where he has served for the past 39 years. He earned his BA from Moody Bible Institute in Chicago, his Master of Arts from Western Seminary in Portland, Oregon and his D.Min from Trinity Theological Seminary in Newburgh, Indiana. Bryan has taught at Bible colleges in Ukraine, Tanzania and Siberia, as well as classes in Albania, Russia, Turkey, Ethiopia, Poland, and Italy. He is the author of 8:28 - Unlocking God’s Promise and Jesus’s Teaching on the Last Days. He presently serves on the faculty of Montana Bible College in Bozeman. Bryan enjoys hunting, reading, and playing basketball. He and his wife, Bev, have three grown children and three grandchildren. Bryan has served on the TMU board since 2000.
Jesse Johnson
Board Member
Jesse Johnson is the Teaching Pastor at Immanuel Bible Church in Northern Virginia. He has his PhD (theology) from Christ College, Sydney. He is a graduate of The University of New Mexico (B.A. in Sociology and Spanish), as well as The Master’s Seminary (ThM in Systematic Theology). Prior to joining the board, Jesse taught theology at The Master’s Seminary, and before that at Christ Baptist Seminary in Polokwane, South Africa. Jesse has been an editor and contributor for numerous publications and books. His most recent book, City of Man, Kingdom of God, examines how Christians should relate to government. He and his wife, Deidre (also a TMU graduate) live with their three daughters in Washington, D.C. Jesse has served on the board since 2015. You can follow his writing at thecripplegate.com.
George Lawson
Board Member
George Lawson is the Teaching Pastor at Baltimore Bible Church. George is a graduate of The Master’s Seminary as well as Washington Bible College. He began his pastoral ministry at Hope Bible Church, in Columbia Maryland, before he and a team planted Baltimore Bible Church. George blogs on thecripplegate.com, and is currently pursuing a Ph. D. program at Baptist Bible Seminary. He and his wife Jennifer have two daughters and one son. George joined the TMUS board in 2021.
Matt MacArthur
Board Member
Matt MacArthur is responsible for managing investments at WCM Investment Management. He has been a board member at Grace to You since 2024 and holds the position of Vice-Chairman at the John MacArthur Charitable Trust. Matt is a graduate of The Master's University.
Felix Martin del Campo Jr.
Board Member
Felix Martin del Campo Jr. is a dentist in Visalia, Calif. He attended USC for his undergraduate work and then graduated from the UCLA School of Dentistry. Felix also serves on the board with Samaritan’s Purse and has served for more than four decades with World Medical Missions. Alongside 800 other doctors, he goes around the world to relieve long-term missionaries on furlough. His specialty is designing and setting up state-of-the-art mobile dental clinics. North Korea and Siberia, among other countries, have benefited from such ministries. He enjoys photography in his spare time and has been married to his wife, Janet, for 46 years. Felix has served on the board since 1992.
Rod Shackelford
Board Member
Rod Shackelford owns Impact-Ortho (formerly SportsTek Medical), making orthopedic medical devices focused on athletics. He graduated from The Master’s University and Cal State Northridge, where he played basketball. He serves as an elder at Christ Church Central Phoenix. Rod and his wife Elizabeth have five children, four of whom have attended TMU, while the fifth is still aspiring.
Kent Stainback
Board Member
Kent Stainback is the CEO of The Stainback Organization, a commercial real estate services firm based in Dallas. He is a graduate of Baylor University in Waco, Texas, and serves as an elder at Trinity Bible Church of Dallas. He joined the board in 2025.
Mark Tatlock
Chairman of the Board
Dr. Mark Tatlock is the president and chairman of The Master’s Academy International (TMAI).
Harry Walls
Board Member
Harry Walls is the Executive Pastor of Stonebridge Bible Church in Brentwood, Tennessee. Prior to that he was the campus pastor for The Master’s University. Harry is a graduate of Brown University, where he played football, and also of Liberty University and Seminary, where he served as campus pastor while preparing for pastoral ministry. Harry was honored with a Doctorate of Divinity degree from The Master's Seminary in 2021. He has served on the TMUS board since 2000. Harry and his wife, Karon, have two children.