MDS Inc. Announces Appointment of James S.A. MacDonald as Chairman of Board of...( John T. Mayberry Decides to Step Down...),Health

John T. Mayberry Decides to Step Down as Chairman

TORONTO, Nov. 19 /PRNewswire-FirstCall/ - MDS Inc. (TSX: MDS; NYSE: MDZ), a leading provider of products and services to the global life-sciences markets, today announced the appointment of James S.A. MacDonald as Chairman of the Company's Board of Directors.

Mr. MacDonald, whose appointment is effective immediately, has been a member of the MDS Board since July 2005. John T. Mayberry, who joined the MDS Board in January 2004, and was appointed Chairman in October of that year, has resigned from the Board, citing other business obligations for his decision to step down. The Board has accepted his resignation.

"Jim MacDonald's deep financial expertise, experience in capital markets and in-depth knowledge of our businesses makes him the ideal choice to lead our Board at this stage in our evolution," said Stephen P. DeFalco, President and Chief Executive Officer of MDS Inc. "I would like to thank John Mayberry for the tremendous contribution he has made to MDS. During his tenure as Chairman, John was instrumental in overseeing the transformation of MDS to a pure-play, global life-sciences company, and championed continuous improvement in corporate governance."

"As an MDS shareholder and member of the Company's Board for the past three-and-a-half years, I've had the opportunity to work closely with MDS's leadership team to focus on driving growth, improving operating performance and shaping the business portfolio," said Mr. MacDonald. "As the new Chairman, I will continue the Board's efforts to create long-term value for shareholders."

Mr. MacDonald, who is a member of the Board's Audit Committee, is Chairman and Managing Partner of Enterprise Capital Management Inc. Prior to 1997, Mr. MacDonald was Deputy Chairman of Scotia McLeod Inc. He is also a director of Cin
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