56 : Tetra Tech Inc.
|Top 100 Revenue:
|2008 earnings :
|Number of employees:
||Dan L. Batrack, chairman, CEO and president
|Lines of business:
||Water resources, watershed management, environmental management, information technology, groundwater services, mining services, geotechnical engineering, water and wastewater, land development services, buildings, transportation services, international development, remedial planning, carbon management, systems test and evaluation, regulatory consulting, disaster management, technical augmentation, construction, unexploded ordnance, wind energy, communications, environmental remediation, nuclear engineering and wetland restoration
||U.S. Agency for International Development, Energy Department, Environmental Protection Agency, Navy and Air Force
||Tetra Tech was one of five companies awarded the $500 million global architect-engineer infrastructure services contract with the U.S. Agency for International Development. The company is providing engineering studies and design services for USAID-funded infrastructure projects.