He moved to SGI in January 1998, becoming chairman of the board and CEO, succeeding Edward R. McCracken. During his time in the systems business, Belluzzo led both HP and SGI through the transition from proprietary systems to industry standard solutions.
Belluzzo became the head of SGI's systems department in January 1998, replacing Edward R. McCracken. During this period, he led both HP and SGI through a transition from customized hardware to widely accepted standards.