Doctor of Ministry

Organizational Leadership

Students will dive deeply into adaptive leadership to become culture shapers in their ministry contexts. Collaborative (not solo) leadership requires particular character, strategy, and perspective. Anchored in biblical and theological foundations, supported by relevant leadership theory and practice, the Organizational Leadership D.Min degree equips pastors, directors, and educators. Students’ capacities develop from the inside out in a vibrant, spiritually formative environment that equips minds, hearts, and hands for a new season of calling.

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Organizational Leadership Cohort Degree Plan

Sample Cohort Syllabi

DM910A Core Course Habits that Sustain Ministry 2 credit hours
DM910B Core Course Habits that Sustain Ministry 2 credit hours
DM911A Core Course Discovering God’s Missional Heart 2 credit hours
DM911B Core Course Discovering God’s Missional Heart 2 credit hours
DM(ORG)915A Seminar I Kenotic Leadership 2 credit hours
DM(ORG)915B Seminar I Kenotic Leadership 2 credit hours
DM(ORG)916A Seminar II Coaching in Complex Systems 2 credit hours
DM(ORG)916B Seminar II Coaching in Complex Systems 2 credit hours
DM(PLE)917A Seminar III Community Shaping Leadership 2 credit hours
DM(PLE)917B Seminar III Community Shaping Leadership 2 credit hours
DM(PLE)918A Seminar IV Leading Change 2 credit hours
DM(PLE)918B Seminar IV Leading Change 2 credit hours


Thomas F. Tumblin, Ph.D. Dr. Tumblin joined Asbury Seminary in 1999 after ten years on staff at Ginghamsburg United Methodist Church (Tipp City, OH). He has five years of experience as a district superintendent overseeing 170 churches. Along with his teaching role at the Seminary, Tom has served with the Doctor of Ministry program, Beeson International Center, Global Partnerships, Church Planting Initiative and the Beeson School of Practical Theology. His research interests include leader identity, change theory and organizational systems.

Dr. David Gyertson joined the Asbury Theological Seminary administration in August 2015. Dr. Gyertson has a broad background in higher education, publishing, consulting, executive coaching, ministry and media and has held senior leadership positions in religious, charitable and educational environments, including international and cross-cultural settings. Before coming to Asbury Theological Seminary, he served as interim Headmaster of Maranatha High School in Pasadena, CA. Prior to that he was Distinguished Professor of Leadership Formation and Renewal at Regent University in Virginia. David was a founding team member of the University in 1977 and returned as President in 1990. Dr. Gyertson also served as President of Asbury University and Taylor University.

Dr. Gyertson is an ordained minister having served in senior pastoral positions in Free Methodist and Presbyterian settings. In addition, Dr. Gyertson is a strategic initiatives consultant and executive coach to faith-based organizations and their leaders specializing in board governance training, transition planning and special projects implementation. He conducts leadership retreats in areas of spiritual formation for organizational leaders, ministry professionals and others desiring to grow personally and professionally as committed followers of Christ. He has delivered numerous lectures and published articles, chapters and books on a variety of topics related to Christian thought and practice, executive leadership as well as Scripture studies and is a frequent speaker/lecturer at conferences, camps, schools, universities & churches.

David’s wife Nancy is a retired elementary school teacher. Their daughter Andrea and her husband Brady are actively involved in the film industry in Los Angeles. The Gyertson’s have two grandchildren.

Bryan D. Sims, Ph.D. Bryan has worked since 2001 as a Leadership and Organizational Change Coach with Spiritual Leadership, Inc. (SLI) where he has trained and coached leaders, teams, churches, and organizations over extended periods of time to bring spiritual awakening and missional effectiveness. He has coached in Anglican, Methodist, Free Methodist, Wesleyan, Baptist, Presbyterian, and non-denominational settings.

Bryan has also been a professor of Leadership and Lay Equipping at Asbury Theological Seminary since 2011. His teaching expertise relates to team leadership, equipping, leading change, adaptive spiritual leadership, and the link between leadership and discipleship.

Bryan is a graduate of West Texas A&M University (1998) and Asbury Theological Seminary (M.Div., 2003) and has a PhD. in Organizational Leadership from Regent University (2009). He is author of Leading Together: Embodying Kenosis through our Greatest Challenges (100M Publishing, 2021) and has authored a chapter in Leadership the Wesleyan Way (Emeth Press, 2016).

He and his wife MyLinda have been happily married since 1997 and have four children: Isaiah, Luke, Silas, and Lydia. They live in Dallas, TX.