Murdock is a rancher from northwest Oklahoma where his family settled before statehood. He farms and runs a cow-calf operation in Felt in southwestern Cimarron County. He has a bachelor’s degree in agricultural business from Panhandle State University.

Murdock served in the House from 2014 - 2018 before being elected to the Senate. While in the House, he served as the Vice Chair of the Utilities Committee as well as on the Appropriations, Agriculture and Rural Development, A&B Transportation and the Transportation Committees.