Cabot Corporation Appoints Brian A. Berube Vice President and General Counsel

April 17, 2003
Boston, MA (April 17, 2003) - Cabot Corporation (NYSE:CBT) recently announced the election of Brian A. Berube as Vice President and General Counsel. Mr. Berube was most recently Business General Counsel.

Mr. Berube joined Cabot in 1994 as Counsel. Prior to that, he was a member of the Corporate Department at Choate, Hall & Stewart, a Boston law firm, where he represented and advised both private and public companies in corporate and securities law, contract and business law, and mergers and acquisitions. Before joining Choate, Hall & Stewart, Mr. Berube served as a law clerk to a justice on the New Hampshire Supreme Court.

He is a member of the Board of Directors of the New England Legal Foundation and is a member of the American Corporate Counsel Association, the Boston Bar Association, and the American Bar Association.

Mr. Berube received his bachelor's degree from the College of the Holy Cross and his law degree from Boston College Law School, where he was a member of the Boston College Law Review.

Cabot Corporation is a global specialty chemicals and materials company headquartered in Boston, MA. Cabot's major products are carbon black, fumed metal oxides, inkjet colorants, and capacitor materials. Cabot has approximately 4,500 employees in more than 45 manufacturing plants and offices located in 23 countries around the world. The website address is http://www.cabot-corp.com/

Contact: Ethel Shepard
Corporate Affairs Manager
617-342-6254
ethel_shepard@cabot-corp.com