Complex sentence: Tremblay has served as mayor of Saguenay since the municipal merger of 2002, and was previously mayor of the now defunct city of Chicoutimi from 1997 until 2001.
Split into simpler sentences: Tremblay has served as mayor of Saguenay since the municipal merger of 2002. He was previously mayor of the now defunct city of Chicoutimi from 1997 until 2001.