Clark was born and raised in Oklahoma City, Oklahoma. He received a bachelor’s degree in accounting from Central State College in Edmond, Oklahoma. He worked fifty years in the insurance industry and retired as President of Curry Insurance in 2016. Clark was a founding board member of LOOPS, Inc. ( Loved Ones of Prisoners) in 1989. He currently serves on several boards and has served as a church elder for many years. He and his wife Janis have actively supported Christian education for over forty years. They remain active in promoting responsible citizenship and constitutional government.
Clark was appointed Chief Operations Officer of The John Birch Society in 2010. He has served as a member of the Executive Committee the past several years and currently serves as Chairman of the Board.
Clark and Janis have been married since 1968 and have two children and six grandchildren.