 PASADENA, Calif.--BUSINESS WIRE--Tetra Tech, Inc. NASDAQ: TTEK, a leading provider of high-end consulting and engineering services, today announced results for the first quarter ended December 27, 2020. First Quarter Results Revenue in the first quarter totaled 765 million and revenue, net of subcontractor costs net revenue1, was 605 million. Operating income was 66 million, up 5 year-over-year, driven by a 70 basis point increase in operating margin. Earnings per share EPS was 0 