Complex sentence: Tamati was employed as a rugby league development officer with Warrington Borough Council for nine years from 1989 to 1997 when he left in 1997 to take up a full-time position coaching the Lancashire Lynx.
Split into simpler sentences: Tamati was employed as a rugby league development officer with Warrington Borough Council for nine years during the 1980s and' 90s. He left in 1997 to take up a full-time position coaching the Lancashire Lynx.