Tetra Tech, Inc. is a provider of consulting, engineering, program management, construction management, and technical services. The Company's segments include Water, Environment and Infrastructure (WEI), Resource Management and Energy (RME), and Remediation and Construction Management (RCM). The WEI segment provides consulting and engineering services. The RME segment provides consulting and engineering services across the world for a range of resource management and energy needs. The Company includes wind-down of its non-core construction activities in the RCM segment. Its solutions span the entire life cycle of consulting and engineering projects and include applied science, research and technology, engineering, design, construction management, operations and maintenance, and information technology. It provides its services to a diverse base of international, the United States commercial, the United Sates federal clients.