Our TUMI National Staff

These gifted and committed individuals are not officially on our staff, they have joined our team to represent TUMI and expand the Kingdom using their gifts and abilities. From working on projects, to representing us in other countries, these men and women are formidable partners in the gospel ministry and we are grateful to serve side by side for the sake of mission!

Director, Rev. Dr. Don L. Davis

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Dr. Don Davis, an ordained minister and native of Wichita, Kansas, is the Founder and Director of World Impact’s Urban Ministry Institute, a research and training center dedicated to equipping leadership and empowering movements for the urban church, especially among the poor, to advance the Kingdom of God in the city.

He attended Wheaton College and Wheaton Graduate School, and graduated summa cum laude in both his B.A. (1988) and M.A. (1989) degrees, in Biblical Studies and Systematic Theology respectively. He earned his Ph.D. in Religion (Theology and Ethics) from the University of Iowa School of Religion (2000). Don and his wife Beth joined staff in the fall of 1975, having served as community minister, as Director of World Impact Wichita, and as Vice President of Education. He has also served in pastoral ministries, as church planter, as associate pastor, and lead pastor.

In addition to his current duties as the Institute’s Director and as professor in its Hope School of Ministry, Dr. Davis also serves as World Impact’s Senior Vice President of Church and Leadership Development. As such, he oversees the training of urban missionaries, church planters, and city pastors, and facilitates training opportunities for urban Christian workers in evangelism, church growth, and pioneer missions. He also leads the Institute’s extensive distance learning programs (as of April 2015 we have 197 Institute satellites in 16 countries), and facilitates leadership development efforts for organizations and denominations like Prison Fellowship, the Evangelical Free Church of America, and the Church of God in Christ.

A recipient of numerous teaching and academic awards, Don has served as professor and faculty at a number of fine academic institutions, having lectured and taught courses in religion, theology, philosophy, and biblical studies at schools such as Wheaton College, St. Ambrose University, the Houston Graduate School of Theology, the University of Iowa School of Religion, the Robert E. Webber Institute of Worship Studies. He has authored a number of books, curricula, and study materials to equip urban leaders, including the Capstone Curriculum, TUMI's premiere 16 module distance education seminary instruction. One of his latest books, Sacred Roots: A Primer On Retrieving the Great Tradition, focuses on how urban churches can be renewed through a rediscovery of the historic orthodox faith. Dr. Davis has participated in academic lectureships such as the Staley Lecture series, renewal conferences like the Promise Keepers rallies, and theological consortiums like the University of Virginia Lived Theology Project Series. Don received the Distinguished Alumni Fellow Award from the University of Iowa College of Liberal Arts and Sciences in 2009. He is also a member of the Society of Biblical Literature, and the American Academy of Religion.

Don has been married to Elizabeth (Beth) since February 1975. Their oldest son, Matthew David, was 26 years old when he went home to be with the Lord in August of 2003. They have two other grown children, Joanna Davis-McEligatt, an Assistant Professor of ethnic studies at the University of Louisiana (Lafayette), and Daniel, who serves as an IT and Social Media Specialist with The Urban Ministry Institute. Perhaps most important of all, Don and Beth are proud grandparents of August, 4, (belonging to Joanna and Colin), and Nadia, 10, and Eleanora, 2 (belonging to Daniel and JennElaine).

Satellite Director, Rev. Don Allsman

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Don Allsman is Vice President of World Impact and the Satellite Director of The Urban Ministry Institute (TUMI), World Impact’s urban leadership development center, supporting the work of dozens of TUMI sites worldwide. He is also the co-dean of the School for Urban Cross-Cultural Church Planting, serving with Dr. Don Davis.

Don grew up in Bakersfield, California where he received the Lord in sixth grade. In high school and college, he was a leader in Fellowship of Christian Athletes and Inter-Varsity Christian Fellowship. Don was captain of his college track and field team a member the 1983 and 1984 conference champion Fresno State track team while completing his Bachelor of Science in Industrial Engineering (1984). He connected with World Impact while earning his Master of Business Administration from Wichita State University (1986). He has experience in construction management (Granite Construction), aerospace (Boeing and Northrop), and management consulting (Wygle and Company).

Don has written two books that are used as textbooks for TUMI’s Capstone Curriculum, The Heroic Venture and Jesus Cropped from the Picture. Since 1991, Don and his wife, Cathy, have been missionaries with World Impact as Vice President of Administration and later as Vice President of Strategic Planning. They have two sons, Mark and Ryan, and daughter-in-law Janée.

Ryan Carter, National Staff

nmg 1439-600Ryan is a native of Houston, Texas. Before joining the World  Impact Wichita staff in 2008, he and his wife, Amber, served among the urban poor in Houston and Dallas. Currently, he is a church planter and the coordinator of Christ the Victor Leadership School, a TUMI Satellite in Wichita. 

He is a graduate of the University of Houston (BA in Philosophy) and Dallas Theological Seminary (ThM in Old Testament Studies and Christian Education). His ministry experience includes children and youth ministries, associate pastor, church planter, and pastor.

The Carters have two young sons, Benjamin (3/10/09) and Nathaniel (12/10/10).

Contact Ryan

Mike Dicke, National Staff

Dicke Mike 5d2b 7968-600Mike earned a Bachelor of Science in Business Marketing from Kansas State University in 1974 before working for The Boeing Company and earned a Masters of Business Administration from Baker University in 2000 before taking early retirement from Boeing in 2008, to take a position with World Impact as Director of Deer Creek Christian Camp. Mike and his wife Mary (who is a Registered Nurse) served for 3 years at Deer Creek before moving to Denver to begin TUMI of Denver in which Mike is the site coordinator.

Mike has also taught TUMI in India on numerous trips there and has been instrumental in starting two TUMI sites in India. He has also traveled to South Africa and the Democratic Republic of the Congo to teach TUMI and assist them in establishing TUMI sites there.  Mary serves at a mobile medical clinic for the homeless and also ministers at Denver Women’s Correctional Facility where Mike assisted Prison Fellowship in starting a TUMI site. He will also be training future TUMI mentors as additional prisons in Colorado begin TUMI.

♦ Contact Mike

Rev. Rich Esselstrom, National Staff


Rich is an ordained minister and graduate of Westmont College (CA) and has served as a urban missionary with World Impact since 1986.

Since joining World Impact, he has served as a community minister, city director and church planter in Wichita, Chester (PA), Dallas and San Diego.  Currently he is the director of The Urban Ministry Institute of San Diego and  on national staff with The Urban Ministry Institute.

 Rich and his wife, Karin, are also on a church plant team in the City Heights area of San Diego.  They have three children, Justin, Karris and Josiah.

♦  Contact Rich

Mary Flin, National Staff

Flin Mary 5d2b 8062-800Mary is establishing TUMI Satellites and SIAFU Chapters in the Northeastern region of Kansas. Mary also serves as Site Coordinator of a TUMI Satellite in Topeka, Ks, is involved in neighborhood ministry, is a Mentor Coordinator for the Shawnee County Jail Annex, coordinates a rotation of TUMI Students who lead and facilitate Sunday morning services for the Annex, and is helping develop SIAFU in Topeka.

Mary received her B.S. in Bible/Christian Education with Emphasis in Counseling from Manhattan Christian College in 1986. She was the wife of a pastor, co-owned a Christian Bookstore and curriculum business for 17 years, and presented training seminars, while serving youth and families through education, drama and music, mostly in rural communities.

After her husband’s death in 2003, God began moving Mary toward urban missions and she and her daughter started volunteering at the Topeka Rescue Mission. In 2007, Mary moved to Topeka. She worked in State Government for 8 years, gaining valuable skills and perspective.  Mary's daughter, Anna, and her husband also live in Topeka.

Juan Pablo Herrera, National Staff

jphcropmmg 5250Juan Pablo Herrera is a part of TUMI National Staff and has been leading a church plant and serving with World Impact in Dallas since 2007. He is a church planter and has given oversight and leadership to churches Guadalajara. He co-leads the Dallas TUMI Satellite and also oversees our TUMI satellite in Guadalajara.

He and his wife, Sol, have been involved in evangelism, church planting, and discipleship through the church for many years and have seen the Holy Spirit work through this ministry, bearing fruit for the Kingdom.

Juan Pablo and Sol live in Dallas and have two grown children.

♦  Contact Juan Pablo

Dr. Bob Lay, National Staff

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Bob Lay was installed as Dean of TUMI-L.A. in June of 2011.  Bob served as Professor of Biblical Studies and Christian Ministry at Taylor University from 1995 through 2010; Assistant Professor of Religion at Northwestern College of Iowa from 1990 to 95; and Christian educator for St. Giles Presbyterian Church from 1980-86.  In 2010 Bob submitted his resignation to Taylor University and, together with his wife Chris, joined the staff of World Impact to serve the inner city of Los Angeles.  Bob has published Readings in Historical Theology: Primary Sources of the Christian Faith  (Kregel Press, 2009), Lessons of Infinite Advantage: William Taylor’s California Experiences (Scarecrow Press, 2010), and several scholarly articles in both the Encyclopedia of Christian Civilization (Wiley-Blackwell) and Encyclopedia of Religion in America (CQ Press, 2011).  Chris serves as secretary for the Los Angeles Christian School, elementary division. 
Bob and Chris celebrated their 30th wedding anniversary in July of 2012. They have one child, Rebekah, who graduated from Taylor University (her father’s favorite among his 300 student/majors during his time at Taylor), and who is married and lives with her husband Jorge Veitia in Miami Beach, Florida. The Veitias lead a successful ministry to survivors of sex trafficking.


Contact Bob


Andrew Lee, National Staff

Andrew Lee joined World Impact in Chester, PA in August of 2002 as a math and science teacher at the Frederick Douglass Christian School (FDCS), he served in various roles such as the Ministry Coordinator, Volunteer Coordinator, a member of the Highland House church plant team, Interim Church Plant Team leader, and the Project Manager for the Grace Dental Clinic . In 2007, Andrew founded and was the first site coordinator for The Urban Ministry Institute (TUMI)- Chester, which expanded in to the State Correctional Institute (SCI) of Chester in 2010. In August of 2010, Andrew was asked to serve as the City Director for World Impact Chester. In 2013, Andrew left World Impact and joined Prison Fellowship as their Field Director for the Mid-Atlantic Region covering, PA, DE, MD, VA, WV, DC and NC. Andrew has a Bachelors of Science degree in Mechanical Engineering from Drexel University and was attending Virginia Tech pursuing his Masters in Mechanical Engineering when God called him to urban ministry.

Andrew enjoys sharing what God has taught him over the years in ministry and believes that God has a great vision for the poor and incarcerated to do great things for His Kingdom. He married his wife, Karen on October of 2008 and their first child, Christopher James Sukyul Lee was born in February of 2010. Their Daughter Karis Ruth SeoYeun Lee was born in June of 2013.

♦  Contact Andrew

Frank Schultz, National Staff

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Frank and his wife Melodi, joined World Impact in 1991.  He served in facility maintenance and ministry group coordinator for the Newark, NJ ministry.  Frank, over the years, has served as the community ministry, city director, city administrator, and church planter.  In 2005, The Urban Ministry Institute - Newark was launched with Frank as site coordinator working with TUMI-Newark until 2013.

Frank currently is the World Impact Thrift Store - Newark manager.  He also supports local leadership in special projects and programs as necessary.

♦  Contact Frank

Adjunct Faculty

To facilitate the training of our students, we enlist mature Christian leaders, pastors, missionaries, and Christian educators from around the country to teach courses at our satellites.  These professors or mentors teach under the direction of The Urban Ministry Institute faculty, using instruction methods and materials which take into account urban needs and cultural diversity.