Portage Environmental helps carry the load for customers needing environmental engineering services. The firm's offerings include environmental remediation, process and project engineering, and decontamination and decommissioning services. Portage Environmental counts US government agencies (such as the Department of Defense and the Department of Energy) and Native American tribes among its clients, and has conducted projects in 20 US states, as well as in Afghanistan, Guam, Iraq, Japan, Kuwait, Qatar, and South Korea. The firm operates from some two dozen offices throughout the US. President and CEO Michael Spry helped found Portage Environmental in 1992.

MWH Global will make it work. The environmental engineering, construction, and management firm specializes in water-related projects or "wet infrastructure." Typical projects include building water treatment or desalination plants, water transmission systems, or storage facilitates. MWH also provides general building services for highway, bridge, airport, and industrial projects. The company is active in nearly 40 countries and serves mainly the water, renewable energy, and infrastructure and industry markets. Affiliates of the employee-owned company include software solutions provider MWH Soft, business and government relations firm mCapitol, and MWH Laboratories, which conducts research.

Michael Crews Development designs and builds single-family homes and suburban communities in Southern California, Utah, and Texas. Its Tyson-Crews Development partnership develops residential properties in and around Phoenix. Michael Crews Development also offers services that include financing, marketing, purchasing, and selling of homes. Its Emerald Crest Engineering division provides land planning and environmental assessment, project feasibility, engineering, construction management, and structural design services. Its Michael Crews Commercial Development unit manages commercial properties, from buying, building, and selling to leasing and tenant build-outs. President Michael Crews owns the company.

United States Lime & Minerals, Inc. manufactures and sells lime and limestone products in the United States. Its products primarily include pulverized limestone, quicklime, hydrated lime, and lime slurry. The company sells its lime and limestone products to highway, street and parking lot contractors, steel producers, municipal sanitation and water treatment facilities, aluminum producers, paper manufacturers, utility plants, glass manufacturers, roof shingle manufacturers, and poultry and cattle feed producers. United States Lime & Minerals, Inc., through its subsidiary, U.S. Lime Company — O & G, LLC, also owns royalty and working interests in natural gas wells located in Johnson County, Texas. The company was founded in 1948 and is headquartered in Dallas, Texas.

OPT-Sciences Corporation, through its subsidiary, O & S Research, Inc., deposits anti-glare and transparent conductive optical coatings on glass used primarily to cover instrument panels in aircraft cockpits. Its products enable pilots to read aircraft instruments in direct sunlight or at night, or in covert situations using appropriate night vision filters. The company offers coatings to various types of glass face plates, which are mounted on the front of liquid crystal displays (LCDs), cathode ray tubes, and electromechanical displays. It also provides glass cutting, grinding, and painting services, as well as manufactures wedge glass lenses for electro-mechanical displays. In addition, the company provides a range of other specialty instrument glass, including night vision filter glass, circular polarizers, touchpads, glass sandwiches for LCDs, and other custom designed specialty glass components and assemblies. It primarily offers its products to commercial, business, and regional aircraft market, as well as to the military aircraft market. The company was founded in 1956 and is based in Cinnaminson, New Jersey.

English Construction Company knows how to rack them up and then put a little English on its projects. The company provides contracting and design/build services for bridges, highways, dams, power plants, waste water treatment plants, and other heavy/civil structures throughout the mid-Atlantic and Southeast US. Its commercial and institutional construction projects include schools, churches, and historic renovations. The fourth-generation family-owned company was founded by W.B. English in 1909.

Skanska USA Building Inc., one of four US-based units of the Swedish construction giant Skanska AB, the company is one of the nation's top general contractors and construction groups. Offerings include pre-construction consultation, design-build, and construction management. It serves sectors ranging from infrastructure, sports and entertainment, education, and health care. The company also provides specialist validation services for pharmaceutical and biotech customers. Skanska's other US companies are Skanska USA Civil, Skanska Infrastructure Development, and Skanska Commercial Development.

Angelo Iafrate Construction Company spends most of its time on the road. The company specializes in highway and road construction and is qualified by the US Department of Transportation to work in more than half of the states across the country. Angelo Iafrate provides preconstruction, construction, and project management services for both the public and private sector. The heavy construction contractor targets clients in the commercial, transportation, utilities, manufacturing, health care, and education industries. Angelo Iafrate also sells used equipment. The company is owned and managed by the Iafrate family.

Phillips and Jordan, Incorporated, founded in 1952 as a small land clearing firm, P&J is a general and specialty contractor that still provides land clearing services in addition to industrial, commercial, and residential site development and heavy civil construction on dams, highways, bridges, railroads, and waterways. P&J also performs reclamation, landfill, and disaster recovery services. The latter includes handling some of the nation's worst disaster cleanups, including hurricanes, floods, toxic spills, and land and rock slides. P&J operates more than a dozen offices throughout the Southeast and in California. The Phillips family owns the company.

CDI Contractors means big buildings in Little Rock and beyond. The company has completed commercial, industrial, and institutional projects, including the William J. Clinton Presidential Library. Other areas of specialty include health care facilities, parking decks, condos, hotels, and educational institutions. CDI Contractors provides a range of services including pre-construction, scheduling, general contracting, and construction and project management. The company was founded in 1987 as a partnership between the late Bill Clark and Dillard's head Bill Dillard II. CDI has built several Dillard's department stores. Dillard's bought the remaining 50% of CDI it did not already own in 2008.

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