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Olin Giles

Missionary, Speaker & Trainer


Olin "O.G." Giles is a full-time missionary, ordained minister, speaker, and trainer at Radical Truth. He has served as a youth pastor, senior pastor, associational youth director, and a Ratio Christi director at Appalachian State University. Engaging unbelievers with the Gospel and equipping the church to defend the historical Christian faith is his passion and purpose in life. His desire to see every Christian equipped and ready to engage in the battle of ideas is at the heart of his ministry and calling. Olin's personal Youtube channel is called, "Why Christianity?"

Financial Support

To support Olin's work, select "Olin Giles" in the 'Directed Funds' area of our Donate page.

Speaking Details

Olin has spoken at national & regional conferences, church sponsored seminars, Sunday school classes, church sermons, college & high school groups, youth groups, organizations, retreats, and political events & meetings.


After coming to know Christ late in life, he walked away from his career of sixteen years as an automatic-transmission technician in 2001 to start his academic journey. Today, Olin has degrees from Fruitland Baptist Bible College, Southern Evangelical Seminary, and Veritas International University (in progress).