Douglas R. Brown

DOUGLAS R. BROWN is Chief Executive Officer of Ionics, Incorporated,
since July 2003 and President since April 1, 2003. From 1985 to 2002,
Mr. Brown worked for Advent International, a global private equity
investment firm with over $5 billion in capital. Mr. Brown served as its
European Managing Director from 1990-1994 and its President and Chief
Executive Officer from 1995 to 2002. From 1976 to 1983, Mr. Brown was
employed by Ionics, Incorporated as a Process Engineer and Product
Manager. He has served on the Ionics Board of Directors since 1996. Mr.
Brown received a Bachelor of Science degree in Chemical Engineering from
Massachusetts Institute of Technology and a Master’s degree in Business
Administration from Harvard University where he was a Baker Scholar and
Loeb Rhodes Fellow in Finance.