Our Field Representatives

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!

Ryan Carter, Field Representative

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, Field Representative

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, Field Representative


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, Field Representative

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, Field Representative

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, Field Representative

Bob portrait

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  

Frank Schultz, Field Representative

Frank Photo-600

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.