Senator Johnson is vice chair of the Joint Energy Committee for the 93rd General Assembly. He is serving as a member on the Senate Revenue and Taxation Committee, Senate City, County and Local Affairs Committee, Joint Budget Committee, Arkansas Legislative Council and serves on several subcommittees.

During his first term, the 2019 regular session, he sponsored legislation to protect the freedom of expression of college students who contribute to school-sponsored journals and periodicals. He also sponsored legislation to strengthen charter schools and school choice laws. Senator Johnson was also a mentor during Boys State (2019.) A native of Crossett, he graduated from Conway High School and Hendrix College.

Senator Johnson started his public career right after college by joining former Congressman Wilbur Mills staff in Washington, D.C. He later worked for the Small Business Administration and then moved back to Arkansas to work for the City of North Little Rock. Senator Johnson served in the cabinet of former Governor Frank White and then moved into the private sector to be an advisor to businesses, cities and organizations on their fundraising efforts.

Senator Johnson is a member of the Little Rock Rotary Club. He has served as chair of the Pulaski County Republican Committee and is currently the President of the Arkansas Republican County Chairmen's Association. Senator Johnson and his wife, Catherine, have been married for over 44 years and they have two grown daughters.