Cognos Appoints Claudio Silvestri
Chief Information Officer

– Tech industry veteran to lead Cognos worldwide IT operations –

OTTAWA, ON and BURLINGTON, MA, November 22, 2005- Cognos (Nasdaq: COGN; TSX: CSN), the world leader in business intelligence and corporate performance management (CPM), today announced that Claudio Silvestri will join the company as chief information officer, effective December 5, 2005. Mr. Silvestri’s responsibilities will include leadership of Cognos worldwide information systems and infrastructure.

A software and technology industry veteran, Mr. Silvestri brings to Cognos a breadth of IT and business expertise and experience. Prior to joining Cognos, Mr. Silvestri served as group vice president, worldwide information technology at Business Objects. Earlier in his career, Mr. Silvestri managed the small business and channel organization for Microsoft Canada, and served as vice president of CRM eBusiness for Compaq Canada. He also served as vice president, information technology during his tenure at Compaq Canada.

Claudio is a leader with proven business and technology acumen,” said Tom Manley, Cognos senior vice president, finance and administration and chief financial officer. “Claudio has a firsthand understanding of the business intelligence and corporate performance management markets, and will be a valued member of the Cognos executive team. We are delighted to welcome him on board.”

About Cognos:
Cognos, the world leader in business intelligence and corporate performance management, delivers software and services that help companies drive, monitor and understand corporate performance.

Cognos delivers the next level of competitive advantage - Corporate Performance Management (CPM) - achieved through the strategic application of BI on an enterprise scale. Our integrated CPM solution helps customers drive performance through planning; monitor performance through scorecarding; and understand performance through business intelligence.

Cognos serves more than 23,000 customers in over 135 countries. Cognos enterprise business intelligence and performance management solutions and services are also available from more than 3,000 worldwide partners and resellers. For more information, visit the Cognos Web site at http://www.cognos.com.