Has spoken in hundreds of churches across America to groups ranging in size from dozens to thousands. Prior to Every Believer a Witness, Dennis served as a pastor for 20 years.

For many of those 20 years, Dennis was also an instructor for Walk Thru the Bible Ministries with Bruce Wilkinson, and later, Chip Ingram.

Dennis twice received the President’s Award as Walk Thru’s #1 ranked instructor. From 2005-2018, Dennis also was a staff evangelist with Johnny Hunt at First Baptist Woodstock, where evangelism is a priority.