Tetra Tech Inc (TTEK) SEC Filing 10-K Annual report for the fiscal year ending Sunday, October 3, 2010

Exhibit 99.1

November 10, 2010

Tetra Tech Reports Fourth Quarter and Fiscal 2010 Results

·                  Q4 Net Revenue up 15% to $421 million — Exceeded Guidance

·                  Q4 Diluted EPS up 13% to $0.37 — Exceeded Guidance

·                  Q4 Backlog up 17% to $1.85 billion

Pasadena, California. Tetra Tech, Inc. (NASDAQ: TTEK) today announced results for the fourth quarter and fiscal year ended October 3, 2010.

Fourth Quarter Results

Revenue in the quarter was $627.4 million, up 9.1% compared to $575.1 million in the fourth quarter last year.  Revenue, net of subcontractor costs(1), was $420.7 million, up 14.6% compared to $367.0 million in the fourth quarter last year.  Operating income was $37.1 million, up 13.6% compared to $32.7 million in the fourth quarter last year.  Net income was $23.1 million, up 12.9% compared to $20.5 million in the fourth quarter last year.  Diluted EPS were $0.37, up 12.7% compared to $0.33 in the fourth quarter last year.  Backlog was $1.85 billion, up 17.1% compared to $1.58 billion at the end of fiscal 2009, and up 10.4% compared to $1.68 billion at the end of the third quarter of 2010.  Cash from operations was $42.3 million, compared to $90.8 million in the fourth quarter last year.  Last year’s $90.8 million of cash from operations included a tax refund of $39.8 million.

Fiscal Year Results

Revenue for fiscal 2010 was $2,201.2 million, compared to $2,287.5 million in fiscal 2009.  Revenue, net of subcontractor costs, was $1,460.2 million, compared to $1,386.1 million in fiscal 2009.  Operating income was $124.5 million, compared to $121.9 million in fiscal 2009.  Net income was $76.8 million, compared to $87.0 million in fiscal 2009.  Last year’s $87.0 million of net income was positively impacted by $13.0 million of income tax benefits.  Diluted EPS in fiscal 2010 were $1.24, compared to $1.43 in fiscal 2009.  Last year’s $1.43 of diluted EPS included approximately $0.21 of income tax benefits.  Cash from operations was $106.8 million, compared to $198.2 million in fiscal 2009.  Last year’s $198.2 million of cash from operations included a tax refund of $39.8 million.

Tetra Tech’s Chairman and CEO, Dan Batrack said, “Tetra Tech finished the year with strong fourth quarter performance that resulted in 9% organic net revenue growth, 17% backlog growth, and net revenue and EPS that exceeded our guidance.  Our fourth quarter performance was driven by growth in our front-end consulting and engineering services across a broad range of customers.  Our backlog, the recent acquisition of BPR, and continuing demand for our front-end services are more than offsetting weak demand for back-end services that we anticipate will continue into fiscal 2011.”