Complex sentence: By the early 1980s, Transfield had in excess of 3,000 employees and an annual turnover of A $350 million; and within five years grew to be the biggest engineering firm in south-east Asia.
Split into simpler sentences: By the early 1980s, Transfield had in excess of 3,000 employees and an annual turnover of A $350 million. Within five years it grew to be the biggest engineering firm in southeast Asia.