Complex sentence: He served as Mayor of the Township of Southwest Oxford from 1988 to 1994, was chair of the "Wardens' Association of Ontario" in 1990--91, and served as a Board Member on the Association of Municipalities of Ontario.
Split into simpler sentences: He served as Mayor of the Township of Southwest Oxford from 1988 to 1994. He was chair of the "Wardens' Association of Ontario" in 1990--91, and served as a Board Member on the Association of Municipalities of Ontario.