Lafarge North America is at the foundation of buildings, roads, and bridges across US and Canada. One of North America's largest building materials manufacturers, the company operates around 600 concrete plants, aggregate plants, and cement plants in the US and Canada (through Lafarge Canada). Its products include asphalt, aggregates, gypsum wallboard, ready-mixed concrete, and concrete pipes and blocks. The products are used to build commercial, residential, transportation, public, and utilities projects. Lafarge North America is part of global building conglomerate Lafarge Group, based in France. It accounts for about 20% of its parent's sales.

Amcol International Corporation focuses on the development and application of minerals and technology products and services to various industrial and consumer markets worldwide. AMCOL International Corporation operates in four segments: Minerals and Materials, Environmental, Oilfield Services, and Transportation. The Minerals and Materials segment mines, processes, and distributes minerals and products with applications for use in various industrial and consumer markets, including metal-casting, pet care, detergents, iron ore pelletizing, and drilling industries. The Environmental segment processes and distributes minerals, products, and services with applications for use as a moisture barrier in commercial construction, landfill liners, and various other industrial and commercial applications. The Oilfield Services segment provides both onshore and offshore water treatment filtration, pipeline separation, waste fluid treatment, nitrogen, rental tools, coil tubing, and well testing data services for the oil and natural gas industry. The Transportation segment includes both a long-haul trucking business and a freight brokerage business for domestic subsidiaries, as well as third parties. AMCOL International Corporation was founded in 1924 and is headquartered in Hoffman Estates, Illinois.

EllisDon is hoping to some day build its way to the very top of Canada's construction industry. One of the country's largest construction companies, EllisDon is a design/build firm that offers a range of services, including preconstruction, engineering, general contracting, and project management. Other services include arranging project financing for clients and updating and designing IT and communication systems for building infrastructures. EllisDon's major projects have included airports, hospitals, office buildings, schools, and shopping centers. The firm does most of its business in Canada, but it has also completed major projects in the US, United Arab Emirates, West Indies, Greece, and other countries.

Barri Electric Company is an electric contracting firm that offers electrical construction, engineering, and related services in California. The company serves customers in the retail, food service, and medical industries, among others. Its clients include the San Francisco International Airport (runway lighting, traffic signals, high-voltage distribution), the College of San Mateo (office remodeling), and FedEx (distribution center). Barri Electric Company was founded by president Ernie Ulibarri.

A leader in the recycling of stainless steel, Keywell also recycles high-temperature alloys, titanium, and other scrap metals such as nickel, molybdenum, nickel-copper alloys and carbide, and tool steel. The company uses inbound and outbound radiation monitors, as well as X-ray analyzers, to identify the metal to be processed. Keywell, which has participated in the recycling business for more than 80 years, operates seven processing facilities in California, Georgia, Illinois, New Jersey, New York, North Carolina, and Pennsylvania. Keywell's employees and private investors own the company.

Shanks Group plc,Europe's largest independent waste disposal enterprise, the company has a full range of waste management operations, including waste collection, transfer, and treatment; incineration; remediation services; hazardous chemicals treatment; and recycling. It operates 43 waste collection, transfer, treatment, incineration, and disposal sites in the UK, 35 in the Netherlands, 18 in Belgium, and one in Canada. Shanks has been working in partnership with local authorities throughout the UK, and has more than 40 municipal waste management contracts. It has similar contracts in Belgium and the Netherlands.

Workman Commercial is always on the job, particularly if the job has anything to do with commercial construction projects in the Lone Star State. Paul Workman established the family-owned enterprise in 1971 and incorporated the company in 1991. The commercial builder focuses on health care, office, recreational, and retail projects (including more than 80 store locations for Walgreen Co.) throughout Texas. It also builds government and religious facilities. CEO Paul Workman owns a majority stake in the company, which has offices in the Austin, Dallas/Fort Worth, and Houston metro areas.

SmithGroup is the oldest continuously practicing architectural and engineering firm in the US. Founded in 1853 in Detroit by architect Sheldon Smith, the firm partnered with engineers in 1907 to become one of the first multidisciplinary firms in the country. Formerly known as Smith, Hinchman & Gryllis, it influenced the skyline of Detroit with structures like the Guardian, Penobscot, and Buhl buildings. These days the group offers architecture engineering, interiors planning, and consulting services and has about a dozen offices across the US. It targets the office, research, education, health care, technologies, and cities and communities markets.

Amedore Homes builds homes and develops residential communities in New York State's Capital District. The firm builds condominiums, townhomes, and single-family detached homes in prices ranging from about $150,000 to the low $400,000s. The company has about a dozen subdivision developments in Albany, Montgomery, Saratoga, Schenectady, and Warren counties. in President George Amedore founded the company as Amedore & Sons Builders in 1974.

Ron Jones Hardwood Sales produces kiln-dried and green Northern Appalachian hardwood lumber for distribution within the US and for export container shipping. Species used to make its lumber include cherry, red and white oak, hard and soft maple, hickory, yellow birch, beech, ash, poplar, and basswood. The company operates a lumber yard with a capacity of more than 3 million board ft. in Franklin, Pennsylvania. It also has 300,000 board ft. kiln capacity there. President Ron Jones and other members of the family own and operate the business.

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