Complex sentence: Bird served as a member of the ISTD Council from 1970 to 1975, received the Imperial Faculty Award in 1996 and became a committee member of the Modern Theatre Branch in 1970, a post which she held for sixteen years until 1986.
Split into simpler sentences: Bird served as a member of the ISTD Council from 1970 to 1975. She became a committee member of the ISTD Modern Theatre Branch in 1970, a post which she held for sixteen years until 1986.