Clark was born and raised in Oklahoma. He earned a bachelor's degree in accounting from Central State College in Edmond, Oklahoma. Upon graduation he immediately found employment in the insurance industry. Now president of Curry Insurance Agency, he was appointed Chief Operations Officer of The John Birch Society in June, 2010. He has served as a member of the Executive Committee for several years.
He has actively worked with state legislators the past thirty years on such issues as opposing the Equal Rights Amendment and opposing a Constitution Convention.
Clark and his wife Janis were married in 1968. He is a church elder and they actively support a Christian school and several ministries.