Greg was born on a small farm in Kirksville, MO. His family eventually moved to Houston in 1966.  After high school he attended the University of Houston to pursue a degree in Political Science.  He works in the insurance business as an Executive General Adjuster for Crawford Global Technical Services, conducting commercial claims following flood or fire damage. Greg is a cancer survivor of Uveal Melanoma and Epitheliod Mesothelioma.  In 2011 he passed his 10 year survivor birthday. He is a pastoral care chaplain for Lifeline Chaplaincy at St. Luke’s Hospital and a volunteer for CanCare, a Christian based cancer support organization.

Greg and his wife Sue have been married for 37 years and have lived in Katy since 1984. Sue is retired and enjoys needlepoint, traveling and baking.  They are pet lovers and have three dogs and a cat.  Greg enjoys soccer, golf, fishing, traveling and telling jokes. The Barnhill's have two grown children. Greg Jr. is general manager of an Italian restaurant in Houston. Ashley is finishing her degree in special needs education in San Antonio, TX. 

Greg is active in the Men's Ministry and is involved in campus expansion work. He loves teaching in the Youth Ministry and frequently serves at youth retreats and on youth mission trips. Greg became a shepherd in 2006 and serves as the resource shepherd for the Prayer Ministry, the Basket Ministry, the Marriage Ministry, and the Widows Ministry.