Haddox started to work as production assistant and production driver in the movie industry. He worked as post-production assistant on the television series Me and Mom (1985, starring Henry Darrow) and on the horror film Demonstone (1989). As production assistant he worked on the television drama Children in the Crossfire (1984, with camera operator Lowell Peterson), the television series Partners in Crime (1984), the television drama Kids Don't Tell (1985, with Robin Gammell, Bob Minor, and Branscombe Richmond), the comedy Bad Guys (1986, with Eddy Donno and Gene LeBell), the action drama Eye of the Tiger (1986), the science fiction film Programmed to Kill (1987), and the science fiction thriller Disaster at Silo 7 (1988).