While attending Pittsworth State High School, Hohn played for the Australian Schoolboys team in 1981. He started his career with the Pittsworth Danes before moving to the Brisbane Rugby League premiership to play with Fortitude Valley Diehards. Hohn also spent a season with Wigan (1986–87). He joined the Brisbane Broncos upon their foundation in 1988, playing in their first ever match and going on to feature in the club's first and second premiership wins in 1992. In the weeks following the Grand Final Hohn travelled with the Broncos to England, where he played at second-row forward in the 1992 World Club Challenge against British champions Wigan, helping Brisbane become the first NSWRL club to win the match in Britain.
Hohn played in the Broncos' grand final winning team again 1993. He also made his Queensland and Australian representative debuts while at Brisbane. During the 1994 NSWRL season, Hohn played at second-row forward for defending premiers Brisbane when they hosted British champions Wigan for the 1994 World Club Challenge.