William O. Johnstone
Mr. Johnstone is the Chief Executive Officer of Council Oak. He has been a Vice Chairman of BancFirst Corporation since 1996. Mr. Johnstone served as Chairman and Chief Executive Officer of C-Teq, Inc., a company that provided data processing services to financial institutions, from 1996 to 2001. Mr. Johnstone has over 30 years of banking experience. From 1985 until 1996, he served as President and Chairman of the Board of City Bankshares, Inc. and its subsidiary, City Bank, Oklahoma City, Oklahoma.

Mr. Johnstone has served on various local and state boards and commissions.

He is a graduate of the University of Oklahoma with a Bachelor of Science Degree in Economics. He also holds a Master's degree in Business Administration from the University of Oklahoma.