Hickman Lumber Co. produces hardwood logs for domestic and foreign markets. Its main unit produces 10 million board feet of hardwood logs per year with an emphasis on black cherry, ash, and white hard maple. Through its Hickman Timber Management subsidiary, the company manages woodlands for private and corporate owners, trusts, and estates. Its Allegheny Mountain Hardwood Flooring company manufactures flooring, specializing in rift and quartered red and white oak. Founder Harry Hickman opened the family's first sawmill in 1938. The Hickman family continues to own and manage Hickman Lumber.

Comp-Utility Corporation provides engineering, design, procurement, and construction services for network operation centers, telecommunications facilities, and other IT systems. It specializes in creating reliable infrastructure systems, including uninterruptible power systems, voice and data cable installations, climate control, and room and storage design. The company has served corporate, government, and contractor customers primarily in Austin, Texas. President Randall Collier, who co-founded the company in 1992, owns Comp-Utility Corporation.

GZA GeoEnvironmental Inc., provides environmental consulting and remediation, geotechnical engineering, construction management, and regulatory compliance services through a network of 25 US locations. It also offers air quality monitoring services through its Airlogics partnership, and operates a soil and rock instrumentation division. The company operates Baystate Environmental Consultants which provides civil engineering, natural resource management, environmental permitting, and environmental land planning services across the US.

Berglund Construction rebuilds crumbling facades. The century-old company specializes in the restoration of stone, concrete, masonry, and curtainwall structures. Berglund works to preserve some of the Midwest's architectural gems including schools, art museums, churches, and office buildings. The company, which mostly works in Illinois, Indiana, Wisconsin, and Ohio, also offers new construction and building services. Past clients include the University of Chicago, Northwestern University, Draper and Kramer, and Andrew Corporation. The company was founded as a masonry maintenance business in 1911 by Fred Berglund. His grandson (and namesake) now runs Berglund.

R.A. Smith National does not claim to be genteel, but it does its best to be civil. The firm provides civil engineering, planning, surveying, and construction services for the public and private sectors. It participates in a variety of municipal projects including road building and the development of water treatment plants and wastewater systems. The company also designs parking lots, parks, bike paths, bridges, and noise barriers. Its customers include state and local agencies and land developers, primarily in southern Wisconsin. Owner and president Richard A. Smith founded the company in 1978.

Jauregui, doing business as Jauregui Architect Builder, custom designs and builds luxury homes in Texas. The company offers architectural, interior design, brokerage, and construction services. Houses typically run in the multi-million dollar price range; architectural styles include contemporary, Tuscan, Mediterranean, and classical Italian. Jauregui Architect Builder operates primarily in the Austin and surrounding Hill Country area, but also has offices in Dallas and Houston.

Alberici helped shape the St. Louis skyline; it now sets its sights -- or its construction sites -- across North America. Alberici Corporation, parent of Alberici Constructors, encompasses a group of enterprises with a presence in North America, Central America, South America, and Europe. Operations include construction services, building materials, and steel fabrication and erection units. Alberici offers general contracting, design/build, construction management, demolition, and specialty contracting services. It also offers facilities management. The Alberici family still holds the largest share of the employee-owned firm, founded in 1918 by John S. Alberici.

Doosan Heavy Industries & Construction quenches the world's thirst for power and water. The company, which is partially owned by Doosan, builds nuclear, thermal, combined cycle, cogeneration, and hydro-power plants worldwide, with projects under way in China, India, South Korea, and the US, among other countries. Doosan Heavy also specializes in building seawater desalination facilities, in addition to water and wastewater plants. Through various other divisions, it builds highways, subways, high-speed railroads, tunnels, gas pipelines, office buildings, and apartments, and supplies casting and forging products and materials handling equipment. Doosan Heavy was established in 1962.

The engineering and construction conglomerate (also known as the Ledcor Group of Companies) holds a network of firms focused on large-scale projects in Canada and the US. The group operates through divisions that specialize in commercial building, heavy civil, industrial, contract mining, and pipeline construction. Ledcor builds condos, office buildings, airports, highways, and industrial complexes; provides mining excavation; and offers network equipment installation, network site maintenance, and fiber-optic cable maintenance. Subsidiary Ledcor Properties invests in real estate. Employee-owned Ledcor was founded in 1947 by William Lede, the father of CEO Dave Lede.

Guarantee Electrical has been powering up St. Louis since it "guaranteed" to electrify the World's Fair in 1904. (It delivered on the guarantee). Now a major US electrical contractor, the company offers commercial, institutional, and industrial services including construction, design/build, communications/data, and maintenance. Guarantee Electrical operates throughout the country and has worked on such varied projects as the MGM Grand in Las Vegas and several post office and prison facilities. Its GECO Systems division installs and services intercom, closed-circuit television, and other audio-visual systems. The Oertli family owns and operates the firm.

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