Parametrix, Inc

Tetra Tech is one of the leading providers of specialized management consulting and technical services. The company focuses on the areas of resource management, infrastructure, and communications. Tetra Tech was founded to provide engineering services related to waterways, harbors and coastal areas. The company has since increased the size and scope of its business and expanded its service offerings through a series of strategic acquisitions and internal growth. Tetra Tech provides environmental services, water and wastewater management, infrastructure services, security design and outsourced technical services.

Operational for more than 25 years, RH2 Engineering is a consulting company that provides project conceptualization, construction management and administration services. It also offers civil engineering, planning and environmental services. In addition, the company provides water, wastewater and stromwater management services. RH2 Engineering offers wetland-related services, including characterization and regulatory typing, delineation, functional assessment, mitigation and restoration design, permit assistance and compliance monitoring. It is staffed with engineers, hydrogeologists, planners and scientists. The company also provides groundwater and surface water interaction analysis, well design, construction and testing and risk assessment services. RH2 Engineering designs electrical systems for reservoirs, well pump stations, water treatment facilities and traffic control signals. It has locations in Silverdale, Bellingham, Richland, Tacoma and Mukilteo, Wash. RH2 Engineering also maintains a location in Bothell, Wash.

Established in 1976, Tres West Engineers offers mechanical and electrical engineering services. It also provides conceptual planning, predesign evaluation, cost estimating, energy simulation, construction and design services. The company offers services for industrial, medical, maintenance and educational facilities, as well as libraries, warehouses and retail stores. Tres West Engineers is staffed with more than 20 engineers with design and construction backgrounds. In addition, it provides industrial ventilation, fire protection, process piping, system analysis and humidity control services. The company also offers energy management, power distribution, power quality analysis and life safety services. Tres West Engineers is located in Tacoma, Wash.