Complex sentence: He worked as an insurance agent, served on the Metropolitan Toronto Council from 1961 to 1972, and was a commissioner on the Toronto Transit Commission from 1975 to 1977.
Split into simpler sentences: He worked as an insurance agent, and served on the Metropolitan Toronto Council from 1961 to 1972. Rotenberg was later appointed as a commissioner on the Toronto Transit Commission, and served from 1975 to 1977.