Instructors and Staff

Travis Jacob

Executive Director and Instructor 

Travis received his MBA from Belhaven College and a bachelor’s degree (Preaching and Counseling) from Florida Christian College. His organizational roles have focused on helping to create strong and healthy workplace cultures. He served in executive roles on the staff at two different churches where he focused on leadership development, building organizational structures and operating systems, and HR. He also served as an Administrator at Boise Bible College as the Dean of Students where he led in strategy, leadership development, and created policy. Travis excels in the areas of leadership and team development. He has been married to the love of his life, Melanie, since October, 2018 and they have three daughters and one granddaughter. He is also a triathlete and 7-time iron distance finisher.  

Class instructor for: Basic Christian Ethics

Jim Book

Instructor and Board Member

Jim spent 17 years as the Sr. Minister of First Christian Church of Winter Park before coming to Kissimmee Christian Church in 2011. He is a 1987 graduate of Johnson University FL (formerly Florida Christian College) and  formerly served as a member of the Board of Trustees. He is presently serving on the Board of Directors of the Christian Restoration Association.  He is happily married to Jeanette and they have three awesome girls - Emilee, Macy, and Mandy.

Class instructor for: God's Word and His Role in America, Positioning the Church for Outreach   

Bob Ritchie 

Director of Internships and Instructor  

Bob is an elder at Kissimmee Christian Church where he has been a member for many years. He has had eleven years of full-time preaching ministry in the state of Florida, two interim preaching ministries, one part-time regular preaching ministry for several years, and he also taught at Florida Christian College/Johnson University Florida for eleven years. His undergraduate degree in Christian Ministries is from Atlanta Christian College, his graduate degree in Christian Doctrine is from Emmanuel School of Religion, and he has a PhD in Historical Theology from Trinity Evangelical Divinity School.

Bob and Sandra have been married for almost 50 years, and they have three children and eight grandchildren.  Bob enjoys teaching adult classes at Kissimmee Christian Church.  Other interests include reading, traveling (with subsequent journals for the trips), and collecting a variety of historical items and collectibles, such as bottles, books, postcards, stereoviews, pinbacks, insulators, communion tokens, travel-related souvenirs, and Daytonalia (items relating to Daytona Beach, his hometown).  Traveling to see his children and grandchildren is a high priority!

Class Instructor for: Basic Christian Tenets, Survey of New Testament  

Adam Robbins


Adam Robbins has served on the ministry staff at Kissimmee Christian Church for over 25 years. In that time he has been the Youth Minister, Discipleship Minister and Church Administrator. Adam is a 1996 graduate of Johnson University (TN) and holds a Master of Science Degree in Psychology from Palm Beach Atlantic University (2016). In addition to serving with the church, Adam maintains a small counseling private practice. His favorite times are spent with his wife of 25+ years, Amy, and their two teenage children, Tristan and Ellie.

Class instructor for: Minister's Life and Daily Work


Cord Bear 


Cord is the executive minister at Tomoka Christian Church in Ormond Beach. He is a graduate of St. Louis Christian College. Under Cord’s leadership with Joe Putting (senior minister), Tomoka has grown from a small church of 100+ to a church of 3000 each weekend, between their 3 campuses.

Class instructor for: Strategies: Streamlining and Directing the Church with Purpose; Developing a Healthy Church and Staff


Preston Free


Preston received his undergraduate preaching degree from Florida Christian College and his MA in Church History from Cincinnati Christian University as well as taking many classes in Theology from Dr. Jack Cottrell at Cincinnati.

Preston grew up with a love for the local church while growing up in Alabama where his parents were faithful serving in the Christian Church.   That same love continues today as he serves the congregation of Encounter Christian Church.  He has been the preaching minister there since 2017.  Preston has been in the ministry full time since 1999.  He is married to Karina, and the two of them serve together on staff at Encounter.  Karina and Preston have five children which keep their lives rather busy, but always an adventure.
Preston enjoys woodworking in his free time, making farm house tables and other pieces of furniture from time to time.  He is also an avid fan of The University of Alabama football team and can be heard yelling “Roll Tide” in front of his TV on Saturdays in the Fall.

Class instructor for: Old Testament Survey, The Church from Pentecost to Present

Mark Atteberry 


Mark spent 46 years in ministry, with the last 31 of those years at Poinciana Christian Church in Kissimmee, Florida. In 2003, Mark’s first book, “The Samson Syndrome”, was published by Thomas Nelson Publishers. Since then, he has become an award-winning author with twenty books in his body of work. Since retiring from full-time ministry in 2020, Mark has continued to write and teach at Advance Center for Ministry Training, and now serves as the preacher for the First Christian Church of Frostproof, Florida.

On the personal side, Mark is married to Marilyn. They have one daughter and two extraordinary grandchildren. Mark is a jazz aficionado and enjoys most sports, being partial to the St. Louis Cardinals, Missouri Tigers, and Tampa Bay Buccaneers. You can visit Mark’s website at:

Class instructor for: Introduction to Preaching I, Navigating Conflict in the Church

Tony Cason 


Tony Cason is in his second round as Music/Worship Minister at Kissimmee Christian Church. He served previously from 1987 to 1998, then moved to Columbus, OH to serve at Worthington Christian Church from 1999 to fall of 2012.  He was thrilled to be given the opportunity to serve again at the church where he started.  Tony holds a Bachelor of Music degree in Piano Performance from the University of Kentucky and has taken all the freshman and sophomore Bible classes from Florida Christian College.  He accompanies several of the middle school and high school choirs in Osceola County.  He has been married for 35 years to Marti (Martha), has 2 grown children, Nicole and Andrew, and 5 incredibly fun grandchildren – Lily, Willie, Bennett, Ella and Ronnie.
Class instructor for: Developing a Healthy Church and Staff 

Greg Marksberry 

Greg Marksberry is the Founding Pastor of Thrive Church which has served the Lake Nona area of Orlando, FL since 2016. Greg is a 1988 graduate of Cincinnati Christian University and has done graduate work in preaching and rhetoric at Cincinnati Bible Seminary and Ball State University. For the past 39 years Greg has led with churches and church planting organizations in Florida, Georgia, Ohio, Indiana, and Kentucky.

Greg is passionate about helping people discover their life-mission and reach their full potential in Christ. He is a recognized leader in the church planting movement, has preached the gospel on five continents, and since 2008 has led hundreds of believers on pilgrimage to the Holy Land. Greg also enjoys trekking and has summited Mt. Kilimanjaro in Tanzania and Mt. Ararat in Turkey. He and his wife, Eliana, have been married for 34 years and have three children, one son-in-law, and one grandchild.

Class instructor for: Introduction to Preaching II; Training Elders and Church Leaders

Kevin Ziegler

Kevin Ziegler has served as the evangelist at the Lakeport Christian Church in Lakeport, Florida, since April 2021. He has spent 36 years in the preaching ministry, serving in Ohio, Pennsylvania, Illinois, and Florida. Kevin received his undergraduate degree from Florida Christian College in 1988. He also holds two Master’s degrees – Cincinnati Bible Seminary and Eastern Illinois University. Both degrees from FCC and CBS are in Biblical Studies, with an emphasis on the Old Testament and preaching. Kevin spent a lot of credit hours in the Hebrew language and Old Testament studies. The EIU degree is in Educational Administration.

Kevin has taught Bible College classes in Kenya (in person) and Uganda (via ZOOM). He has also taught classes for the Northeast Ohio Bible College. Kevin has preached and taught, also, in Grenada, West Indies. He has preached at several family camp meetings and conferences, along with directing the Restoration Family Camp meeting each May in Watseka, IL. Kevin is married to Paula Ziegler, and they have six children, and eleven grandchildren.

When not working, Kevin loves taking pictures of God’s beautiful creation, and he has had this hobby since a teenager. In 2023, he had three photos chosen for statewide projects in the state of Florida. Two of his photos were included in a set of postcards for the Florida Trails Association. Another one was included in a calendar for the Florida Association of Counties.

Class instructor for: Messianic Prophecy

Kellie Spencer

Kellie Spencer is the Graphic Designer and Events Coordinator at Kissimmee Christian Church.  She graduated from Florida Christian College in 2009 with her degree in counseling and then later pursued and obtained her Masters in Business Administration from Johnson University.  After graduation she was hired to work at FCC in the Financial Aid department and quickly worked her way up to being the Director of Admissions.  While there she oversaw record breaking enrollment and the merger to Johnson University.

Kellie has a heart for helping churches who are struggling with their marketing, that is why she decided to start her own business called Kingdom Kreative Designs, to help bridge the gap for churches who don’t have a full time graphics person.

She has also written chapters in a couple books, See What Love Can Do and Rooted in Christ.

Kellie also works alongside her husband, Lance, doing Student ministry and has a passion for young adults and their walk with the Lord. When she’s not busy working her full-time job, her other full-time job is being a mother to two wonderful kiddos, Camden and Raelynn, whom she loves spending time with.  Kellie has an abiding passion for guiding an upcoming generation to walk closely with the Lord and she loves doing it alongside her husband.

Class instructor for: Marketing the Church for Growth