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Tetra Tech Companies 

Tetra Tech and its subsidiaries work together as a full-service company to meet all of our clients' needs. We have the local presence and global resources you need for the life cycle of your project.

Advanced Management Technology, Inc.

Advent Engineering Services, Inc.
Ardaman & Associates, Inc.
ARD, Inc.

Bryan A. Stirrat & Associates
Cosentini Associates, Inc.
The Delaney Group, Inc.
Engineering Management Concepts, Inc.
GeoTrans, Inc.

Haselwood Enterprises Inc.
INCA Engineers, Inc.

Tetra Tech Architects & Engineers
Tetra Tech Construction Services, Inc.
Tetra Tech EC, Inc.
Tetra Tech Electric, Inc.
Tetra Tech EM Inc.
Tetra Tech FC, LLC
Tetra Tech NUS, Inc.
Tetra Tech Rizzo, Inc.
Tetra Tech RMC, Inc.

Tetra Tech Tesoro, Inc.

Wardrop, A Tetra Tech Company

Western Utility Contractors, Inc.

Advanced Management Technology, Inc.
Advanced Management Technology, Inc. (AMTI) is a provider of information technology services and solutions to the federal government. For more than 15 years, AMTI has delivered high value and complex technical solutions, establishing an outstanding reputation in the industry. AMTI focuses on three areas of service delivery: information technology (IT), program management, and technical consulting. AMTI prides itself in delivering a full range of IT services from supercomputing, visualization, and performance modeling to life cycle software application development, internet/intranet/extranet, and helpdesk services and support. Our ability to understand each client’s mission and focus ensures that we continually deliver high quality services that exceed client expectations. Its headquarters is located in Arlington, Virginia. (703) 841-2684.

Advent Engineering Services, Inc.
Advent Engineering Services, Inc. (Advent) is a multi-disciplinary engineering, consulting, and licensing firm that provides services to the nuclear power industry. Advent provides award-winning services in the areas of information management, design process improvement, regulatory compliance, complex problem solving, engineering design and evaluations, and quality assurance. Advent’s expertise includes environmental qualification, Appendix R fire protection, new plant COL support, existing plant design modification 50.59 evaluations, nuclear site security support, FSAR and regulatory compliance consulting, engineering analysis (TH, HELB, etc.), and emergency planning. Advent is headquartered in Ann Arbor, Michigan. (734) 930-7500.

Ardaman & Associates, Inc.
Based in Orlando, Florida, Ardaman & Associates provides engineering services to both the public and private sector, along the Gulf Coast, nationwide, and internationally. The services provided include subsurface investigation, foundation engineering, laboratory testing, construction materials testing and inspection, water resources, pre-acquisition site assessments, contamination remediation, phosphogypsum disposal, and earthen dams and facilities engineering. Its headquarters is located in Orlando, Florida, with 13 branch offices throughout Florida and Louisiana. (407) 855-3860.

ARD, Inc.
ARD plans, designs, implements, and evaluates projects, and conducts research in five service areas: governance and institutional development; natural resources and the environment; agriculture and rural development; infrastructure, especially water supply, sanitation, and environmental health; and information and knowledge management. ARD has established an excellent reputation for its ability to manage large, complex development projects, providing the right mix of logistic, program management, and technical assistance. Since its founding in 1977, ARD has conducted hundreds of domestic and international projects and comprehensive, crosscutting development programs. ARD’s headquarters is located in Burlington, Vermont. (802) 658-3890.

Bryan A. Stirrat & Associates (BAS)
BAS, A Tetra Tech Company, is a solid waste, environmental, and civil infrastructure firm with more than 25 years of experience managing landfill and hazardous waste projects for municipal and commercial clients. BAS supports the full waste management project life cycle, from planning to engineering, construction, and operations and maintenance. BAS also provides specialized services including landfill gas management, geotechnical consulting, and public infrastructure support services. BAS is based in Diamond Bar, California. (909) 860-7777.

Cosentini Associates, Inc.
Since its founding in 1952, consulting engineering firm Cosentini Associates has worked closely with leading architects, developers, and government agencies in the design of many of the world’s most innovative and celebrated buildings. These include such renowned projects as the Guggenheim Museum in Bilbao, Spain; the U.S. Holocaust Museum in Washington, District of Columbia; Time Warner Center in New York, New York; the Mortimer B. Zuckerman Research Center at Memorial Sloan Kettering Cancer Center in New York, New York; the world headquarters of Owens Corning in Toledo, Ohio; and many others. The firm provides mechanical, electrical, plumbing, and fire protection engineering; mission-critical design; specialty telecommunications, security, audiovisual, and lighting design; sustainable/LEED ^® design; commissioning; and construction services. Cosentini's clients include major cultural institutions, global corporations, premier healthcare providers and universities, financial services firms, residential developers, and hospitality corporations, etc. The firm is headquartered in New York, New York. (212) 615-3600.

The Delaney Group, Inc.
The Delaney Group provides program management and construction services for energy, heavy civil, site development, and infrastructure projects, including wind energy, roads, bridges, grading, utilities, base realignment and closure (BRAC) services, and water/wastewater treatment and conveyance facilities. Its headquarters is located in Gloversville, New York. (518) 661-5304.

Engineering Management Concepts, Inc.
Engineering Management Concepts (Tetra Tech - EMC) provides technical and staff augmentation services to the commercial sector and government agencies. Areas of service include computer system design, analysis and integration; systems engineering, test and evaluation; and logistics support services; facilities operations and management services; environmental studies and analysis; human capital management services; earned value management services; technical writing; and modeling and simulation. Tetra Tech - EMC's headquarters is located in Camarillo, California. (805) 484-9082.

GeoTrans, Inc.
Specializing in groundwater flow and transport modeling, GeoTrans has provided services to some of the most complex environmental sites across the United States such as the Savannah River Site, the Lipari Landfill, the Nevada Test Site, Love Canal, and the Rocky Mountain Arsenal. Its skill set encompasses core capabilities such as integrated site characterization, field investigation, risk assessment and clean-up, groundwater modeling and analysis, characterization and remediation of NAPL, brownfields redevelopment, information management, remedial design, implementation and oversight, water resources, litigation and negotiation support, telecommunications site acquisition, remedial system evaluation and optimization, mine closure, and ISO 14000 implementation. Founded in 1979, GeoTrans has grown to over a dozen offices nationwide, with its headquarters located in Sterling, Virginia. (703) 444-7000.

Haselwood Enterprises Inc.
Haselwood Enterprises (Haselwood) provides professional technical and management services for nuclear materials and weapons program infrastructure and operations, safeguards and security, environmental remediation, and waste management programs in support of government contractors and government agencies. Haselwood is primarily focused on serving the U.S. Department of Energy (DOE) and the National Nuclear Security Administration (NNSA) missions, and operates out of facilities in close proximity to major DOE/NNSA nuclear weapons program sites, national laboratories, and environmental clean-up sites. Haselwood’s headquarters is located in Oak Ridge, Tennessee. (865) 483-7007.

INCA Engineers, Inc.
INCA Engineers provides civil, structural, transportation, traffic, mechanical and electrical engineering, surveying and mapping to public and private clients. INCA is known worldwide as a leader in navigational facilities design and development. INCA provides design and analysis of marine facilities, concrete and steel bridges, retaining walls, navigation lock and dam structures, flood control, underground structures, and waterfront facilities for ports and harbors. Its civil/transportation projects include major interchanges, highways, and interstate freeways; urban and rural arterial streets; and transit facilities. INCA's mechanical/electrical group designs valves, gates, cranes, hoists, and hydroelectric facilities and movable bridges. INCA also offers field-to-finish surveying and mapping using the latest technology. INCA’s headquarters is located in Bellevue, Washington, with an office in New Orleans, Louisiana. (425) 635-1000.

Tetra Tech Architects & Engineers
A leader in architecture and engineering for more than 40 years, Tetra Tech Architects & Engineers has designed and completed hundreds of the best facilities throughout the Northeast and Mid-Atlantic Regions. Tetra Tech Architects & Engineers offers a complete menu of professional in-house planning, design, construction administration services to schools and universities, federal government, municipalities, and private clients (including sports teams and commercial builders). With seven offices throughout New York, New Jersey, and Delaware, Tetra Tech Architects & Engineers provides architecture, engineering, landscape, interior design, security design, technology design, energy services, and construction administration. Its headquarters is located in Ithaca, New York. (607) 277-7100.

Tetra Tech Construction Services, Inc.
Tetra Tech Construction Services, Inc. (CSI) provides telecommunication services and solutions to federal, state, and local governments and to the private sector. Tetra Tech CSI focuses pre-construction planning and cost evaluations; engineering and program management; and full turnkey network construction including tower, underground, aerial, and premise wiring. Trusted partners include Utopia, Verizon FiOS, ports and harbors, international airports, and the U.S. Department of Transportation. Its headquarters is located outside Denver, Colorado. (720) 881-7111.

Tetra Tech EC, Inc.
Tetra Tech EC, Inc. offers a wide array of consulting, engineering, and construction services, including air services; assessment and investigation; ecological services; energy and environmental permitting; GIS; geoscience services; mitigation banking; port, harbor, and waterway services including navigational and levee controls; occupational safety and health; operations and maintenance; pipeline services; pollution prevention/waste minimization; public involvement services; regulatory compliance and permitting; remediation; remedial design; risk-based management; telecommunications; services for unexploded ordnance (UXO)/munitions and explosives of concern; full-service energy solutions including design/build, facilities construction, and waste management; and infrastructure services, including grading and utilities, roads, bridges, and combined sewer overflow projects. Its headquarters is located in Morris Plains, New Jersey. (973) 630-8000.

Tetra Tech Electric, Inc.
Tetra Tech Electric, Inc. (TtEI) is a full-service electrical contractor that provides project management and construction services for transmission, distribution, substation, switchyard, generation, and renewable energy projects. TtEI’s capabilities include design-build, wind energy, collection systems, tower wiring, overhead power lines, underground systems, utility installations, and electrical facilities. Its headquarters is located in Portland, Oregon. (503) 261-6240.

Tetra Tech EM Inc.
With more than 30 offices nationwide, Tetra Tech EMI offers environmental consulting and engineering services including site investigation and clean-up, emergency preparedness and response, disaster management, green services, energy management, hazardous waste/materials management, air and water quality, regulatory compliance, information management, and training to government agencies and private clients in the United States and internationally. Its headquarters is located in Chicago, Illinois. (312) 201-7700.

Tetra Tech FC, LLC
Tetra Tech Facilities Construction is a general contracting division of Tetra Tech that provides full-service design/build, guaranteed maximum price, design-bid-build, CM-at-risk, and agency program/construction management services worldwide for the U.S. Department of Defense, other federal /local government agencies, and private and commercial clients. Its headquarters is located in Alexandria, Virginia. (571) 527-4440.

Tetra Tech NUS, Inc.
With 19 offices nationwide, Tetra Tech NUS provides environmental consulting and engineering, remediation/construction, and information technology services to both government and commercial clients. Expertise includes air quality, regulatory compliance, remediation, environmental analysis and planning, radioactive and hazardous waste management, GIS, nuclear plant licensing, radiation protection/health physics, risk assessment, National Environmental Policy Act (NEPA), training, unexploded ordnance (UXO), and water and wastewater treatment. Its headquarters is located in Pittsburgh, Pennsylvania. (412) 921-7090.

Tetra Tech Rizzo, Inc.
Tetra Tech Rizzo provides full A-E program management for the development of wide-ranging facilities and infrastructure. We guide multidisciplinary projects from concept through construction, with integrated site/civil engineering, transportation, water/wastewater and environmental services. Our diverse portfolio includes projects for government, commercial, and institutional clients in the United States and abroad, with strong capabilities in completing design/build programs under aggressive schedules. Tetra Tech Rizzo is based in New England. (508) 903-2000.

Tetra Tech RMC, Inc.
Tetra Tech RMC specializes in land-use planning/urban design, landscape architecture, civil engineering, water, and wastewater services, water resources, transportation, geotechnical and environmental engineering, surveying and mapping, and design/build services for private, municipal, and commercial clients. Its headquarters is located in Longmont, Colorado. (303) 772-5282.

Tetra Tech Tesoro, Inc.
Tetra Tech Tesoro is a construction services firm with a proven track record of success, particularly in design-build project delivery for federal clients including the U.S. Navy, U.S. Coast Guard, and other federal government entities. Tetra Tech Tesoro provides construction management and other construction services to build and repair facilities in support of military construction programs, military transformation initiatives, and the U.S. Department of Defense’s Base Realignment and Closure (BRAC) activities. The firm has supported the construction and rehabilitation of military headquarters, administrative facilities, operational facilities, training facilities, barracks, family housing, dining facilities, personnel support facilities, industrial facilities, and piers. Tetra Tech Tesoro is headquartered in Virginia Beach, Virginia. (757) 518-8491.

Wardrop, A Tetra Tech Company
Established in 1955, Wardrop, A Tetra Tech Company (Wardrop) is a Canadian-based consulting company providing front-end studies, engineering, and environmental services for resource management, energy, and infrastructure markets. Wardrop offers feasibility studies, conceptual and detailed design, procurement, and construction management, among other technical consulting and engineering services. Wardrop currently employs approximately 1,200 employees and has been named one of Canada’s Top 100 Employers eight times. Wardrop is based in Mississauga, ON, Canada. (905) 369-3000 or toll free at 1-877-987-3211.

Western Utility Contractors, Inc.
Based in Illinois, Western Utility Contractors, Inc. has been involved primarily in the construction of coaxial and fiber-optic infrastructure and sewer and water infrastructure for nearly 15 years. A pioneer in the field, it provides underground construction and installation services for wiring cable distribution systems, including many located in downtown Chicago and suburban municipalities. WUC also provides 24/7 emergency response for sewer and water breaks and fiber outages. Its headquarters is located in University Park, Illinois. 708-235-1408.