PASADENA, Calif.–(BUSINESS WIRE)–Tetra Tech, Inc. (NASDAQ: TTEK), a leading provider of high-end consulting and engineering services, announced today that the U.S. Agency for International Development (USAID) awarded Tetra Tech a multiple-award contract to provide global infrastructure services with a shared capacity of $800 million. Under the five-year contract Tetra Tech will provide global architect-engineer services to USAID to drive sustainable economic growth, expand educational opportu