Through its subsidiaries, Recology handles garbage collection, recycling, and other waste management services for more than 570,000 residential customers and 55,000 commercial customers in San Francisco and some 50 other California communities. The employee-owned company operates landfills, transfer stations, and hundreds of recycling programs. Recology's recycling operations include materials-recovery facilities, recycling of construction and demolition debris, and composting of food and other organic waste.

OYO Corporation, which conducts geological research and consults on construction projects. Its geological services include aerial surveys, geophysical exploration, well logging, and fossil and rock analysis. The firm also offers construction consultancy services such as land-use and city planning, environmental engineering, and groundwater and soil pollution studies. OYO makes measuring instruments such as seismometers and borehole logging systems. The company also provides risk management and disaster prevention services.

The Cretex Companies is a conglomerate of companies that manufacture a diverse range of products, spanning from steel heart-pacemaker components to reinforced concrete pipe. Primarily operating in the Midwest, the company is organized into three operating units: commercial products (medical implants, machines stampings, plastic moldings, and steel machining); concrete products (reinforced concrete pipe and other precast and prestessed concrete products for infrastructure use); and construction products (precast and prestressed concrete products used in buildings, stadiums, bridges, and other structures). Its results may be concrete, and the same can be said about many of its products.

Fortis Construction isn't afraid to get its hands dirty. The fast-growing US construction company offers general contracting, preconstruction, construction management, and environmentally-friendly green building services to customers primarily in Portland, Oregon and others in the Pacific Northwest. It specializes in remodeling and upgrading corporate offices, health care facilities, retail complexes, and schools; it also conducts seismic and structural upgrades. Customers have included Oregon State University, Portland State University, PPG Industries, and StanCorp.

MasTec, Inc. operates as a specialty contractor in the United States. It involves in the building, installation, maintenance, and upgrade of utility and communications infrastructure. The company builds wind farms, solar farms, and underground and overhead distribution systems, such as trenches, conduits, cable, power lines, and pipelines, which provide wireless and wireline communications, electrical power generation and delivery, and natural gas, crude oil, and refined products transport. It also installs buried and aerial fiber optic cables, coaxial cables, copper lines, electrical and other energy distribution systems, transmission systems, and satellite dishes, as well as deploys and manages network connections. In addition, MasTec offers regular maintenance of distribution facilities and networks, as well as provides emergency services for accidents or storm damage. It serves utility, communications, and government customers. The company was founded in 1929 and is headquartered in Coral Gables, Florida.

In 1975, company founder William L. Butler started a small construction company based out of the back of his pick-up truck. Bill’s innate ability to surround himself with people who share the same values has enabled W. L. Butler Construction, Inc. to experience phenomenal success and become a reputable, quality-focused, full-service company specializing in automotive, biotech/medical, commercial, facilities and retail construction. W. L. Butler Construction, Inc. has experienced steady growth since 1975. We are well positioned to deliver the value being demanded by some of the most astute clientele with offices throughout California. Additionally, we are registered / licensed in the states of Arizona, Colorado, Idaho, Montana, Nevada, Washington and Wyoming.

Vulcan Materials Company engages in the production and sale of construction aggregates for the infrastructure industry primarily in the United States. The company operates in three segments: Aggregates, Asphalt Mix and Concrete, and Cement. The Aggregates segment produces construction aggregates, including crushed stone, sand and gravel, and recycled concrete. Its aggregates are used in public and private sector construction projects, including highways, water and sewer systems, industrial manufacturing facilities, and residential and nonresidential buildings, as well as railroad track ballast.

Miller Electric Company is now transmitting business beyond state lines. Florida-based Miller provides electrical services including construction, installation, renovation, and maintenance to customers across the US. The company serves many industries, including the communications, construction, health care, and transportation segments. Outside of Florida, the company has offices in Alabama, Arkansas, Georgia, North Carolina, Virginia, and Washington DC. Clients have included Anheuser Busch, Bank of America , Blue Cross and Blue Shield, and the University of North Florida. Miller Electric was founded by Henry G. Miller in 1928.

Gray Construction doesn't have the blues when it comes to building projects. The firm is a top US design and construction firm. Through its subsidiaries the company works on a large array of commercial and industrial projects in the US and Japan. It ranks among the top US contractors in auto plant, distribution/warehouse, and processing plant construction. It also serves the federal government (including military projects), education, medical, and retail industries. Subsidiaries include WS Construction (heavy industrial and commercial contracting); Gray-I.C.E. Builders, Inc. (retail, commercial, industrial, and public construction); and Operations Associates (facilities, supply chain, and consulting).

LondonWaste Ltd provides waste collection and disposal services for seven northern London boroughs and offers commercial and clinical waste management services to public and private businesses and institutions in the area. LondonWaste processes more than 1 million tons of solid waste per year, but the company doesn't just dump the trash: It recycles glass, metals, wood and other materials, then burns whatever else it can to produce energy via its waste-to-energy power plant. LondonWaste is jointly owned by the North London Waste Authority (NLWA) and SITA UK (part of SUEZ Environnement.)

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