AECOM designs, builds, finances and operates infrastructure assets for governments, businesses and organizations. The company provides: planning, consulting, architectural and engineering design services to commercial and government clients in transportation, facilities, environmental, energy, water and government markets; construction services, including building construction and energy, infrastructure and industrial construction; as well as program and facilities management and maintenance, training, logistics, consulting, technical assistance, and systems integration and information technology services, for agencies of the United States government and for other national governments.

Argan is a holding company. The company conducts operations through its subsidiaries: Gemma Power Systems, LLC, which is an engineering, procurement and construction contractor; Atlantic Projects Company Limited, which provides turbine, boiler and rotating equipment installation, commissioning and outage services; The Roberts Company, Inc., which provides on-site services that support maintenance, shutdowns and emergency mobilizations for industrial plants in the southern region of the U.S.; and Southern Maryland Cable, Inc., which conducts business as SMC Infrastructure Solutions, and provides technology wiring and utility construction solutions to customers in the mid-Atlantic region of the U.S.

BWX Technologies is a manufacturer of nuclear components, a developer of nuclear technologies and a service provider. The company operates three segments: Nuclear Operations Group, which engineers, designs and manufactures precision naval nuclear components, reactors and nuclear fuel for the U.S. Department of Energy/National Nuclear Security Administration's Naval Nuclear Propulsion Program; Nuclear Services Group, which provides services including nuclear materials processing and management and operating services; and Nuclear Power Group, which designs and manufactures commercial nuclear steam generators, heat exchangers, pressure vessels, reactor components and other auxiliary equipment.

Construction Partners is a holding company. Through its wholly owned subsidiaries, the company provides a variety of products and services to infrastructure projects, with a focus on highways, roads, bridges, airports, and commercial and residential sites. The company's primary operations consist of manufacturing and distributing hot mix asphalt (HMA), paving activities, including the construction of roadway base layers and application of asphalt pavement, site development, including the installation of utility and drainage systems, mining aggregates, such as sand and gravel, that are used as raw materials in the production of HMA, and distributing liquid asphalt cement in connection with HMA production.

Dycom Industries is a provider of specialty contracting services. The company supplies telecommunications providers with a portfolio of specialty services, including program management; planning; engineering and design; aerial, underground, and wireless construction; maintenance; and fulfillment services for telecommunications providers. Additionally, the company provides underground facility locating services for various utilities, including telecommunications providers, and other construction and maintenance services for electric and gas utilities. The company supplies the labor, tools, and equipment necessary to provide these services to its customers.

EMCOR Group is an electrical and mechanical construction and facilities services firm. In addition, the company provides building services and industrial services. The company's services are provided to its customers through its operating subsidiaries and joint venture entities. The company engages in providing construction services relating to electrical and mechanical systems in various types of facilities and in providing various services relating to the operation, maintenance and management of facilities. The company also provides its construction services indirectly by acting as a subcontractor to general contractors, systems suppliers, construction managers, developers, property managers and other subcontractors.

Fluor is a holding company. Through its subsidiaries, the company provides engineering, procurement, construction, fabrication and modularization, operations, maintenance and asset integrity, as well as project management services. The company serves a set of industries including oil and gas, chemicals and petrochemicals, mining and metals, transportation, power, life sciences and manufacturing. The company is also a service provider to the U.S. federal government and governments abroad; and it performs operations, maintenance and asset integrity activities for industrial clients. The company has four segments: Energy & Chemicals; Mining, Industrial, Infrastructure & Power; Diversified Services; and Government.

Granite Construction is a holding company, which delivers infrastructure solutions for public and private clients. The company's segments are: Transportation, which focuses on construction and rehabilitation of roads, pavement preservation, bridges, rail lines, airports and marine ports; Water, which focuses on water-related construction and water management solutions; Specialty, which focuses on construction of various complex projects including infrastructure/site development, mining, public safety, tunnel and power projects; and Materials, which focuses on production of aggregates, asphalt and construction related materials as well as proprietary sanitary and storm water rehabilitation products.

IES Holdings is a holding company. The company has four business segments: Commercial & Industrial, which provides electrical and mechanical design, construction, and maintenance services to the commercial and industrial markets in various regional markets and nationwide in certain areas such as the power infrastructure market; Communications, which provides technology infrastructure services to corporations and independent businesses; Infrastructure Solutions, which provides electro-mechanical solutions for industrial operations; and Residential, which provides electrical installation services for single-family housing and multi-family apartment complexes.

MasTec is an infrastructure construction company operating mainly throughout North America across a range of industries. The company's segments include: Communications, which performs engineering, construction, maintenance and customer fulfillment activities related to communications infrastructure; Oil and Gas, which performs engineering, construction and maintenance services on oil and natural gas pipelines and processing facilities; Electrical Transmission, which performs engineering, construction and maintenance of electrical transmission lines and substations; and Power Generation and Industrial, which performs installation and construction of power facilities.

MYR Group is a holding company of electrical construction service providers. Through its subsidiaries, the company serves the electric utility infrastructure, commercial and industrial construction markets located throughout the U.S. and Canada. The company manages its operations through two segments: Transmission and Distribution, which provides services on electric transmission and distribution networks and substation facilities; and Commercial and Industrial, which provides services such as the design, installation, maintenance and repair of commercial and industrial wiring, installation of traffic networks and the installation of bridge, roadway and tunnel lighting.

Quanta Services is a provider of contracting services, delivering infrastructure solutions for the electric power, energy and communications industries in the United States, Canada, Australia, Latin America and select other international markets. The company has two segments: Electric Power Infrastructure Services, which provides network solutions to customers in the electric power industry and services that support the development of renewable energy generation; and Pipeline and Industrial Infrastructure Services, which provides infrastructure solutions to customers involved in the development, transportation, distribution, storage and processing of natural gas, oil and other products.

Sterling Construction is a construction company that focuses in heavy civil construction and infrastructure rehabilitation as well as residential construction projects. The company operates primarily in Arizona, California, Colorado, Hawaii, Nevada, Texas and Utah, as well as other states. The company's heavy civil construction projects include highways, roads, bridges, airfields, ports, light rail, water, wastewater and storm drainage systems, foundations for multi-family homes, commercial concrete projects and parking structures. Residential construction projects include concrete foundations for single-family homes.