Complex sentence: In the late 1980s and early 1990s Simpson gained a reputation for turning around struggling companies, however as previous CEO of Marconi plc he presided over one of the largest collapses in British corporate history.
Split into simpler sentences: In the late 1980s and early 1990s Simpson gained a reputation for turning around struggling companies. However, as CEO of Marconi plc he presided over one of the largest collapses in British corporate history.