Complex sentence: Taylor began his career at the Globe and Mail in 1995, before in 1997 moving to the "Toronto Star" where he worked as an assistant business editor for three years before returning to the Globe as a columnist.
Split into simpler sentences: Taylor began his career at the Globe and Mail in 1995. He moved to the "Toronto Star" in 1997 where he worked as an assistant business editor for three years before returning to the Globe as a columnist.