Chermiti has been mentioned as one of the African players of the year due to his performance in the African Champions League, where he scored eight goals in the tournament. He is credited for Etoile's superb performance in the Champions League.
On 6 August 2008, he officially transferred to Hertha BSC and played his first match for them the following day in the first round of the German Cup. On 11 August 2009, Chermiti was loaned to Saudi Arabian top club Al-Ittihad for one year and returned on 30 June 2010.
On 5 July 2010, Chermiti signed a four-year contract with FC Zürich until summer 2014.