PASADENA, Calif.–(BUSINESS WIRE)–Tetra Tech, Inc. (NASDAQ: TTEK), a leading provider of high-end consulting and engineering services, announced today that The Kaizen Company (Kaizen) has joined its international development practice. Kaizen is an industry leader in development advisory and management consulting services with more than 150 staff globally, offering a suite of innovative tools that support advanced solutions in health, education, governance, peace and stability, and sustainable