Randy Nix was born on June 19, 1952, in Holtville, Alabama. Nix received a bachelor's degree in business from Troy State University. Nix served for five years as a chaplain's assistant while in the U.S. Army Reserve. He later served for seven years in the Alabama Air National Guard and was honorably discharged as a weapons system officer with the rank of captain. Nix's career was in financial services and he has also served as a pastor.

Nix was a Republican member of the Georgia House of Representatives, representing District 69 which encompasses parts of Carroll, Heard, and Troup counties, from 2007 to 2023. While in the Georgia House he served as chairman of the Ethics Committee and as Secretary of the Banks and Banking Committee. He also served as a member of the Appropriations, Education, Economic Development and Tourism, Legislative and Congressional Reapportionment, Natural Resources and Environment, and Creative Arts and Entertainment committees. Nix also served as an ex-officio member of the Judiciary Committee.