DIRECTORS

Li-San Hwang*
Chairman
Tetra Tech, Inc.

Albert E. Smith
Vice Chairman
Tetra Tech, Inc.

Dan L. Batrack
Chief Executive Officer
and Chief Operating Officer
Tetra Tech, Inc.

J. Christopher Lewis
General Partner
Riordan, Lewis & Haden

Daniel A. Whalen**
Private Investor
Founder of Whalen & Company

Hugh M. Grant
Business Consultant
Former Vice Chairman and
Regional Managing Partner
Ernst & Young, LLP

Richard H. Truly
Vice Admiral U.S. Navy (Ret.)
Retired NASA Administrator

Lee A. McIntire
Former President
Global Civil Infrastructure Business
Bechtel Group, Inc.

*Will become Chairman Emeritus following 2006 Annual Meeting

**Will not stand for re-election in 2006