Complex sentence: Ward served as a parliamentary assistant to the Minister of Skills Development from 1990 to 1991, and as parliamentary assistant to the Minister of Industry, Trade and Technology from 1991 to 1993.
Split into simpler sentences: Ward served as a parliamentary assistant to the Minister of Skills Development from 1990 to 1991. He was later parliamentary assistant to the Minister of Industry, Trade and Technology from 1991 to 1993.