Complex sentence: In addition to working in film and television, Collins has also been active in the theater community of Calgary since the 1960s, and served as the artistic director of the Pleiades Theater from 1976 until 1990.
Split into simpler sentences: In addition to working in film and television, Collins has also been active in the theater community of Calgary since the 1960s. She served as the artistic director of the Pleiades Theater from 1976 until 1990.