Tetra Tech NUS, Inc., provides environmental consulting, engineering, and remediation services. Its expertise extends to such areas as air quality management, compliance services, environmental analysis and planning, health sciences, homeland security, information technology, radioactive and hazardous waste investigation and protection, and water and wastewater treatment. Now part of engineering giant Tetra Tech, the company stemmed from nuclear utility consulting and engineering firm Nuclear Utility Services Corporation (NUS Corporation), which was founded in 1960. Clients, including government agencies and commercial industries, are served through 17 offices across the US.

Brown and Caldwell,the employee-owned firm provides environmental consulting and engineering services to industrial, governmental, and utility clients. Brown and Caldwell designs and builds water, wastewater, and solid waste systems for clients in the paper and pulp, food processing, and chemical manufacturing industries. It offers watershed and stormwater management services, as well as pipeline engineering and repair services. The company provides soil and groundwater remediation, underground storage-tank management, risk assessment, and customized data management systems. It operates from 45 offices spread throughout the US.

M. A. Mortenson Company,the general contractor performs construction, development, and design-build services for a variety of projects. Sectors served include aviation, corporate, education, electronics and semiconductors, entertainment, health care, hospitality, manufacturing, and retail; the company also has groups devoted to federal contracting, sports venues, facilities operations, and renewable energy, including wind farms and biofuel facilities. Active throughout the US, the company also has operations in China, helping its domestic clients to expand into markets there. M.A. Mortenson has about 10 offices, including a location in Shanghai.

Nortek delivers a breath of fresh air. The company makes and distributes heating, air conditioning, ventilation (HVAC), and home technology products for the residential and commercial construction, remodeling, and renovation markets. In addition to HVAC systems, Nortek's wares include range hoods and other ventilation products, indoor air-quality systems, lighting controls, and home entertainment and security system equipment. Products, which are sold primarily in North America and Europe, bear the Nortek name, along with other brands including Broan-NuTone, as well as such licensed names as Frigidaire and Maytag.

TM Deer Park Services Limited Partnership (which does business as Texas Molecular) helps chemical and petrochemical companies get rid of hazardous and nonhazardous industrial waste. Through subsidiaries, the company transports, treats, and stores the waste before disposing of it by injecting it into deep wells. Texas Molecular operates from facilities near chemical and petrochemical production complexes in Deer Park, near Houston. The company's chemicals unit manufactures specialty chemicals on a tolling basis (customers pay per unit of volume) using customer-supplied materials. Texas Molecular was formed in 2001 to purchase assets from the GNI Group, which had filed for bankruptcy protection.

EnergySolutions, Inc. provides technology-based nuclear services to government and commercial customers in the United States and internationally. The company operates in four segments: Federal Services; Commercial Services; Logistics, Processing, and Disposal (LP&D); and International. The Federal Services segment engages in the management and operation or clean-up of the U.S. Department of Energy facilities that are contaminated by radioactive materials. It offers onsite characterization, sorting, segregation, transportation, management, and disposal of classified and unclassified solid and liquid low-level radioactive waste, mixed low-level waste, and other special wastes. This segment also performs decontamination and decommissioning (D&D), and demolition of facilities, including the disposal of radioactive materials; and provides D&D, processing, and disposal services to the U.S. Department of Defense. The Commercial Services segment offers a range of onsite services, including project planning, site surveys, radioactive material characterization and management, liquid waste processing, spent nuclear fuel, emergency response, and other nuclear services to commercial customers comprising commercial power and utility companies that operate nuclear power plants, pharmaceutical companies, research laboratories, universities, industrial facilities, and other entities that generate radioactive materials. The LP&D segment provides various logistics, processing, and disposal services, as well as owns and operates facilities for processing and disposal of radioactive materials. The International segment operates, defuels, and decommissions 10 nuclear power sites, as well as provides services for the disposal of radioactive sources from non-nuclear power generating facilities, such as hospitals, research facilities, and other manufacturing and industrial facilities in Europe and Asia. The company was founded in 1988 and is based in Salt Lake City, Utah.

Installux provides the framework that will allow it to be the window to your world. The French manufacturer operates several divisions, Installux Aluminum, Stores Roche, Tiaso, and Sofadi, each of which offers different aluminum frame and fitting products used in residential and commercial construction. Its products are used in door, window, awning, and wall partition installation. Installux has operations in Europe and Asia, as well as in the Middle East, where it is actively expanding. It has supplied products to such projects as the Gajria building in Bahrain and the Beverly Hills tower in Qatar.

Nasland Engineering provides civil engineering, surveying, and land planning services to private land developers and government agencies in Southern California and Arizona. It offers services for developing subdivisions, commercial/industrial sites, apartments and condominiums, and streets and highways. It also offers flood-control planning, utilities system design, hydrology studies, assessment district engineering, and consulting services. Projects include work for Sea World, the San Diego River Improvement Project, and the redesign of National City, California's "Mile of Cars" auto dealer district. In 1959 Don Nasland founded the company; his two sons, Don and Steven, now own and operate Nasland Engineering.

HOCHTIEF is a giant in Germany and beyond. In addition to doing business throughout Europe, the construction-related services provider operates in the Americas and the Asia/Pacific region and is among the world's largest general builders. US subsidiaries Turner and Flatiron provide building and infrastructure construction. Leighton Holdings, based in Australia, provides engineering and construction services for the infrastructure and mining industries. The group also operates in European countries including the Czech Republic, Poland, Russia, and the UK. HOCHTIEF focuses all of its business around the world in six areas: Americas, Asia Pacific, Europe, real estate, services, and concessions.

Page Southerland Page performs pre-design planning, architectural, engineering, historic preservation, interior design, and sustainable design services. Its portfolio of projects includes corporate, education, health care, hospitality, government, and science and technology facilities. Page Southerland Page traces its beginnings to a two-person office established by brothers Charles and Louis Page in Austin, Texas in 1898; Louis Southerland joined the firm during the 1930s. The company has additional offices in Dallas, Denver, Houston, and Washington, DC.

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