C. Overaa & Co. has been making its mark in Northern California. Norwegian immigrant and carpenter Carl Overaa founded the company in 1907 in order to help rebuild San Francisco after a major earthquake struck. Today the family-owned company builds institutional, commercial, industrial, public, and housing projects primarily in San Francisco's East Bay. It provides preconstruction, design/build, construction, sustainable building, and contracting services. The company's customers have included Courtyard by Marriott, the John Muir Medical Center, the US Postal Service, YMCA, and the University of California, Berkeley.

MEDCO Construction, a subsidiary of Baylor Health Care System. The general contractor began building hospitals and other facilities for the health care industry. It now has expanded its project list to include office buildings, education and athletic facilities, churches, and renovations. The company has three divisions -- millwork, electrical, and mechanical -- that carry out its work in millwork fabrication and installation; electrical and voice and data installations; concrete framework placing and finishing; mechanical and plumbing services; and engineering and layout services.

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.

Shepherd Homes has tended its portfolio well. The company develops urban and rural properties for a diverse range of homebuyers, from one-bedroom apartments to five-bedroom executive homes. Shepherd Homes is a subsidiary of Shepherd Building Group Limited, one of the largest family-owned, private companies in the UK building industry.

Atwell provides real estate and development consulting encompassing civil engineering, land planning, surveying, and environmental services. Spanning the commercial, residential, corporate real estate, and institutional development markets, the company helps clients manage real estate development projects and navigate local regulations and planning requirements. The company's consulting services include feasibility studies and economic viability analysis. Atwell's more technical services consist of surveying, civil engineering, landscape architecture as well as expertise covering environmental impact, water and wastewater systems, and water resource management.

Casella Waste Systems, Inc. provides resource management services, primarily in the areas of solid waste collection, transfer, disposal, and recycling services to the residential, commercial, municipal, and industrial customers in the United States. It offers non-hazardous solid waste services, including collection operations, transfer stations, material recycling facilities, and disposal facilities. The company also markets recyclable metals, aluminum, plastics, and paper and corrugated cardboard, which have been processed at its facilities; and recyclables purchased from third parties. In addition, it generates and sells electricity under a contract at a waste-to-energy facility. The company has operations in Vermont, New Hampshire, New York, Massachusetts, Maine, Connecticut, Pennsylvania, New Jersey, North Carolina, Tennessee, Georgia, Florida, Michigan, and Wisconsin. It has a 50% joint venture with US GreenFiber LLC to manufacture, market, and sell cellulose insulation, which is used in residential dwellings and manufactured housings. As of August 31, 2010, the company owned and/or operated 31 solid waste collection operations, 30 transfer stations, 34 recycling facilities, 8 subtitle D landfills, and 1 landfill permitted to accept construction and demolition materials, as well as 1 waste-to-energy facility. Casella Waste Systems, Inc. was founded in 1975 and is based in Rutland, Vermont.

GWV and its subsidiaries produce veneers, hardwood logs, and other wood products for customers all over the world. It utilizes approximately 100 different species of wood to produce its veneers. The company's General Woods & Veneers Consultants International subsidiary provides forest management consultation to governments, para-governmental entities, and private organizations to aid in maintaining healthy forest resources globally. GWV has offices and plants in Canada, China, Gabon, Hungary, Japan, the Philippines, Russia, Switzerland, the US, and Vietnam.

Bulley & Andrews is in the business of pushing brick and concrete around. The general contractor offers new construction on commercial, industrial, and residential buildings, as well as renovation, historical restoration, and design/build services primarily in the Chicago area. Its projects have included condominiums, banks, hospitals, hotels, offices, places of worship, and schools. Together with its Meyne division, the firm is involved in projects for The University of Chicago, Host Hotels & Resorts, and Countrywide. Stonemason Frederick Bulley and architect Alfred Andrews founded the company in 1891. Fred's grandson, Allan Bulley Jr., is the company's chairman and CEO.

The RDI Group operates three business units specializing in the design and manufacture of highly engineered equipment for the asphalt roofing, construction and metal coil processing industries. These machinery and manufacturing solutions designed, built and commissioned by Reichel & Drews and Chicago Slitter have been helping customers improve productivity and profits since the early 1900s. Hundreds of patented designs and thousands of installations attest to the leadership role the RDI Group business units hold in the continuing quest for innovative technology.

Abengoa has an environmental interest in engineering. The company develops environmentally sustainable projects by focusing its business on five main areas: solar energy; bioenergy; waste recycling and management; information technology; and engineering and industrial construction. It provides engineering and infrastructure services to the energy, telecommunications, transportation, water, and environmental industries in more than 70 countries worldwide. It also controls Spanish aluminum and steel-dust recycling company Befesa Medio Ambiente and US-based ethanol producer Abengoa Bioenergy Corp. The Benjumea family controls about 56% of Abengoa.

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