Trabelsi marked his debut in the club Sfax Railways Sports before joining CS Sfaxien.
In 1998 FIFA World Cup, he became the leader of the Tunisian national team and he formed an undefeated defense line with Khaled Badra.
[citation needed] Trabelsi had 52 caps for the Tunisia national football team and was a participant at the 1998 FIFA World Cup.
[citation needed] On 11 March 2011, Trabelsi was officially appointed as the manager of the Tunisian national team.
[citation needed] On 8 June 2013, Trabelsi was named head coach of the Qatari side Al Sailiya.