Complex sentence: His work in the technology sector started at Sun Microsystems in 1987 where he was later promoted to Chief Operating Officer in 1998, and in 1999 was also awarded the title of President.
Split into simpler sentences: His work in the technology sector started at Sun Microsystems in 1987. He was later promoted to Chief Operating Officer in 1998, and in 1999 was also awarded the title of President.