THE CORPORATE LIBRARY

Related Party Transactions and Outside Related Director Information

Tetra Tech, Inc. (TTEK)

1/18/2006 Proxy Information

No related party transactions or special relationships reported for this company. Director relationships marked "Outside Related" at this firm will most often be former executives of the company. Additional information regarding these relationships will be added during our regular updates.

1/13/2005 Proxy Information

Mr. Whalen joined the board of Tetra Tech, Inc. upon their merger with Whalen & Company, Inc. in June 1997. He is a former President of Whalen and a former executive officer of Tetra Tech, Inc.

1/13/2004 Proxy Information

Mr. Whalen joined the board of Tetra Tech, Inc. upon their merger with Whalen & Company, Inc. in June 1997. He is a former President of Whalen and a former executive officer of Tetra Tech, Inc.