Allen is an attorney with over 36 years of legal experience. After obtaining his BA in accounting and marketing from the University of Oklahoma he attended their law school.
After graduation, Allen became a staff attorney for Koch Industries in Wichita, Kansas and then associate Senior counsel for Mitchell Energy & Development in Houston, Texas. He also served as general counsel for Texas Petroleum Corporation in Oklahoma City, Oklahoma as well as general counsel for Samson Energy Corporation in Tulsa, Oklahoma before entering into private practice in 1984.
He is a member of Oklahoma, Kansas and Texas Bar Associations and a member of the Tulsa County Bar Association. When not practicing law, Allen enjoys fishing, hiking, coaching and refereeing soccer.