Dean Grabill (and his wife Karen) served for ten years as an associate pastor in Revere, Massachusetts and Lafayette, Indiana, and for fourteen years as a senior pastor in Gulf Breeze, Florida; Linton, Indiana; and Springfield, Missouri.  Since December 2002 he has been the senior pastor of First Assembly of God, Peoria, Illinois.

Additionally, he served Central Bible College (Springfield, Missouri) from January 1992 to May 1997 as a full-time faculty member in the areas of Bible and Church Ministries.  From June 1997 to June 2002, he served that institution as Vice President of Academics.

Pastor Grabill received his Bachelor of Science degree in secondary mathematics education from Indiana University of Pennsylvania (1968), his Master of Divinity from Gordon-Conwell Theological Seminary (1971), and his Doctor of Ministry from Trinity Evangelical Divinity School (1988).

The Grabills are blessed with three children (and eight grandchildren) all of whom are serving in full-time ministry.