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"... rooted and grounded in love..."  Ephesians 3:17

XIBI's classrooms reach
around the world

From Leadership training to Heaven studies, we aim to promote Bible literacy across the Christian world


The Koine Greek word "Xulon" means "tree" and just as a tree needs light and water to dig its roots deep and grow in strength, the Xulon International Bible Institute seeks to minister by sharing the Light and Water of the Word of God so that Christians everywhere may dig deep doctrinal roots and grow in both the wisdom and missionary zeal for the Lord.


Brad Zockoll

Brad Zockoll, Director of the Xulon International Bible Institute, received his B.A. in Bible from Bob Jones University in 1981, and his M.A. and Ph.D. in Biblical Studies from Newburgh Theological Seminary in 2005.  Dr. Zockoll has written for both Alpha Omega Publications and Focus on the Family Publications and has helped in church-planting efforts in Ohio and North Carolina.  His past classroom teaching included on the Bible faculty at Grace Christian Academy in Knoxville TN and is an adjunct professor for King University's satellite campus in Knoxville. 


Rob Kelley

Rob Kelley, Director of Finance and Strategic Development for XIBI, received his Bachelors in Accounting from Bob Jones University and has been a leader in the financial field for years.  He brings 12 years of financial industry experience including success in private equity, banking, and technology. Rob is currently serving on a board at counseling the non-profit Life Focus Center in New Jersey.

He has more than 7 years of experience in corporate finance, startup (Zockoll Pottery), finance and in management consulting. 


Pastor Bobby McCoy is a contributing author and consultant to the Heaven Tour.


Bobby was raised in Oak Ridge, Tennessee. At the age of 5, he trusted Christ as his Savior while attending Children’s Church at Oak Ridge Baptist Church. After attending seminary where he earned a Master of Arts in Pastoral Studies degree and a Master of Divinity degree, Bobby joined the staff of Oak Ridge Baptist Church in 2004. He has been the senior pastor since the summer of 2015 with a heart for discipleship and reaching the community with the Gospel.


In 1999, Bobby had God-ordained circumstances enter his life that drastically changed its course when Bobby was involved in a car accident and became a quadriplegic.

You can read about the story here:



"Illinois Online"
"Florida Online"
"Texas Online"
"Midwest USA Online"
"Michigan Online"
    and even 
"Australia Online"

Whether in the morning, afternoon or evening, the outreach of XIBI connects laymen and leaders with strong Biblical teaching.  We are actively teaching online through video courses and direct face-to-face Zoom and Facebook Messenger live classes.  As we grow in our capabilities, we seek to use better and better methods in which to teach God's truth.

The Heaven Tour is our next ministry step in which Brad Zockoll has been reaching and teaching about the Biblical insight about Heaven.  The response has been tremendous, exceeding all expectations that were originally planned by XIBI.  God has shown us   

new horizons of outreach both online and in-person, reaching virtually every state in the USA and across the globe.  When he is not recording a podcast or video Brad has con the road at churches and coffee houses, reaching both Christians and non-Christians with the Scriptural truths about Heaven.  Please pray for the Heaven Tour as we enter a new year with great opportunities of service for the Lord!

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