Complex sentence: Chynoweth had served as president of both the WHL from 1972 and the CHL from 1975 until leaving both posts in 1995 to form the Edmonton Ice, remaining with the franchise through it's transfer to Kootenay until his death in 2008.
Split into simpler sentences: Chynoweth had served as president of both the WHL from 1972 and the CHL from 1975 until leaving both posts in 1995 to form the Edmonton Ice. He remained with the franchise through it's transfer to Kootenay until his death in 2008.