MKS Appoints Michael Harris Chief Operating Officer

Waterloo, ON - July 22, 2002: MKS Inc. (MKS) (TSE:MKX), chairman and CEO Philip C. Deck today announced that Michael Harris has been appointed Chief Operating Officer effective July 22, 2002. Reporting to the CEO, Mr. Harris oversees sales, services, marketing, customer care, product management and research and development from the company's Waterloo, Ontario headquarters. The finance, human resources, information technology services, legal and administration functions will continue to report to MKS CFO, Robert Dietrich.

Mr. Harris has a long and successful track record in the enterprise software and services industry with particular achievements in enterprise sales, services and marketing. Mr. Harris's experience will be particularly beneficial in MKS's continued transformation into an enterprise software configuration management company.

"I am delighted that Michael has chosen to join MKS to lead our operations. As we refine our strategy and organization to meet the demands of the enterprise software market, his experience will be invaluable," said Philip C. Deck, chairman and CEO of MKS. "This appointment completes the management revitalization that we began 18 months ago and puts us in position for long term growth."

"I am very pleased to be joining Phil and the rest of the MKS team, and MKS at this stage of its development," said Michael Harris. "With an exciting new product lineup, a healthy pipeline and a strong balance sheet, MKS has a unique opportunity to capture a leading share of the enterprise segment of the software configuration market."

Mr. Harris previously held the position of President of Industry Specific Applications (ISA) as well as CEO of the Interealty division for Geac Computer Corporation. He guided Interealty to become a leading supplier of web-based services to the real estate industry. He also restored the ISA group to profitability while at the same time bringing several successful products to the marketplace. Prior to Geac, Mr. Harris held executive positions of increasing responsibility at SunGard Data Systems, based out of New York and London, England. Mr. Harris's last position with SunGard was as Managing Director for Global Professional Services. Prior to that he managed sales and service for the Americas region where he oversaw the closing of numerous key transactions.

About MKS
MKS Inc. ("MKS") (TSE:MKX) provides software solutions enabling development teams to analyze, build and deploy traditional and web-based software systems quickly and reliably. The company's award-winning family of MKS Integrity software configuration management (SCM) products, offer advanced technology with robust workflow, code management, and impact analysis capabilities. MKS also provides interoperability solutions under its popular MKS Toolkit brand for UNIX-Windows co-existence, cross-platform development, and system administration that significantly cut development and administrative costs and reduce time to market while enabling enhanced performance. Founded in 1984 with over 10,000 customers worldwide, MKS has built its brand on the foundation of advanced technology, superior quality and extraordinary customer service. More information about MKS can be found at http://www.mks.com, or by calling 1-800-265-2797 (US & Canada), +49-711-351775-0 (Germany), and +44-1483-733900 (United Kingdom).

This news release contains forward-looking statements that involve risks and uncertainties, which may cause actual results to differ materially from the statements made. When used in this document, the words "may", "would", "could", "will", "intend", "plan", "anticipate", "believe", "estimate", "expect" and similar expressions are intended to identify forward-looking statements. Such statements reflect the Company's current views with respect to future events and are subject to such risks and uncertainties. Many factors could cause our actual results to differ materially from the statements made including those factors detailed from time to time in filings made by the Company with Canadian securities regulatory authorities. Should one or more of these risks or uncertainties materialize, or should assumptions underlying the forward looking statements prove incorrect, actual results may vary materially from those described herein as intended, planned, anticipated or expected. The Company does not intend and does not assume any obligation to update these forward-looking statements.

MKS and MKS Toolkit are trademarks of MKS Inc. All other trademarks mentioned in this release are the property of their respective owners.

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