Leidos Holdings, Inc., together with its subsidiaries, provides services and solutions in the defense, intelligence, civil, and health markets in the United States and internationally. The company operates through Defense Solutions, Civil, and Health segments. The Defense Solutions segment offers national security solutions and systems for air, land, sea, space, and cyberspace for the U.S. Intelligence Community, the Department of Defense, the space development agency, the National Aeronautics and Space Administration, defense information systems agency, military services, and government agencies of U.S. allies abroad, as well as other federal and commercial customers in the national security industry. The solutions include technology, large-scale systems, command and control platforms, data analytics, logistics, and cybersecurity solutions, as well as intelligence analysis and operations support services to critical missions. The Civil segment provides systems integration services to air navigation service providers, including the federal aviation administration, the En route automation modernization, advanced technology oceanic procedure, time based flow management, terminal flight data management, geo-7, and future flight services, as well as enterprise-information display systems; and security detection services. It also offers information technology (IT) solutions in cloud computing, mobility, application modernization, DevOps, data center, network modernization, asset management, help desk operations, and digital workplace enablement; and environment, energy, and infrastructure services. The Health segment offers solutions to federal and commercial customers responsible for health and well-being of people, include health information management, managed health, digital modernization, and life sciences research and development services. Leidos Holdings, Inc. was founded in 1969 and is headquartered in Reston, Virginia.

EMCOR Group, Inc. provides construction and facilities, building, and industrial services in the United States and the United Kingdom. It offers design, integration, installation, start-up, operation, and maintenance services related to power transmission, distribution, and generation systems; energy solutions; premises electrical and lighting systems; process instrumentation; low-voltage systems; voice and data communications systems; roadway and transit lighting, signaling, and fiber optic lines; computerized traffic control systems, and signal and communication equipment; heating, ventilation, air conditioning, refrigeration, and geothermal solutions; clean-room process ventilation systems; fire protection and suppression systems; plumbing, process, and high-purity piping systems; controls and filtration systems; water and wastewater treatment systems; central plant heating and cooling systems; crane and rigging services; millwright services; and steel fabrication, erection, and welding services. The company also provides building services that covers commercial and government site-based operations and maintenance; facility management, maintenance, and services; energy efficiency retrofit services; military base operations support services; services for indoor air quality; floor care and janitorial services; landscaping, lot sweeping, and snow removal services; vendor management and call center services; installation and support for building systems; program development, management, and maintenance for energy systems; technical consulting and diagnostic services; infrastructure and building projects; modification and retrofit projects; and other building services, including reception, security, and catering services. In addition, it offers refinery turnaround planning and engineering; welding; overhaul and maintenance; instrumentation and electrical; and renewable energy services. The company was incorporated in 1987 and is headquartered in Norwalk, Connecticut.

Comfort Systems USA, Inc., together with its subsidiaries, provides mechanical and electrical installation, renovation, maintenance, repair, and replacement services for the mechanical and electrical services industry in the United States. It operates through two segments, Mechanical and Electrical. The company offers heating, ventilation, and air conditioning systems, as well as plumbing, electrical, piping and controls, off-site construction, monitoring, and fire protection. It also engages in the design, engineering, integration, installation, and start-up of mechanical, electrical, and plumbing (MEP) and related systems in new buildings; and renovation, expansion, maintenance, monitoring, repair, and replacement of MEP systems in existing buildings. In addition, the company provides remote monitoring of power usage, temperature, pressure, humidity and air flow for MEP and other building systems. It serves building owners and developers, general contractors, architects, consulting engineers, and property managers in the commercial, industrial, and institutional MEP markets. Comfort Systems USA, Inc. was founded in 1917 and is headquartered in Houston, Texas.

IES Holdings, Inc. engages in the design and installation of integrated electrical and technology systems, and provides infrastructure products and services in the United States. The Communications segment designs, installs, and maintains network infrastructure within data centers for co-location and managed hosting customers; corporate, educational, financial, hospitality, and healthcare buildings; e-commerce distribution centers; and high-tech manufacturing facilities. This segment also provides design and installation services for audio/visual, telephone, fire, and wireless access and intrusion alarm systems; and engages in designing/building, servicing, and maintaining data network systems. The Residential segment offers electrical installations to single-family housing and multi-family apartments; and cable television installations to residential and light commercial applications, as well as installs residential solar power for new construction and existing residences. The Infrastructure Solutions segment maintains and repairs alternating and direct current electric motors and generators, and power generating and distribution equipment; manufactures custom-engineered metal enclosed bus duct solutions used in power distribution; manufactures custom commercial and industrial generator enclosures; manufactures, re-manufactures, and repairs industrial lifting magnets; and maintains and repairs railroad main and auxiliary generators, main alternators, and traction motors. The Commercial & Industrial segment offers electrical and mechanical design, construction, and maintenance services for office buildings, manufacturing facilities, data centers, chemical plants, refineries, wind farms, solar facilities, municipal infrastructures, and health care facilities. The company was formerly known as Integrated Electrical Services, Inc. and changed its name to IES Holdings, Inc. in May 2016. IES Holdings, Inc. was incorporated in 1997 and is headquartered in Houston, Texas.

ABM Industries Incorporated, through its subsidiaries, engages in the provision of integrated facility, infrastructure, and mobility solutions in the United States and internationally. It operates through Business & Industry, Manufacturing & Distribution, Education, Aviation, and Technical Solutions segments. The company offers janitorial, facilities engineering, and parking services for commercial real estate properties, including corporate offices for high tech clients, sports and entertainment venues, and traditional hospitals and non-acute healthcare facilities; provides vehicle maintenance and other services to rental car providers. It also offers integrated facility services, engineering, and other specialized services in various types of manufacturing, distribution, and data center facilities. In addition, the company delivers custodial and landscaping and grounds for public school districts, private schools, colleges, and universities. Further, it supports airlines and airports with services comprising passenger assistance, catering logistics, air cabin maintenance, and transportation services. Additionally, the company provides electric vehicle power design, installation, and maintenance, as well as microgrid systems installations. ABM Industries Incorporated was founded in 1909 and is headquartered in New York, New York.

BrightView Holdings, Inc., through its subsidiaries, provides commercial landscaping services in the United States. It operates in two segments, Maintenance Services and Development Services. The Maintenance Services segment delivers a suite of recurring commercial landscaping services, including mowing, gardening, mulching and snow removal, water management, irrigation maintenance, tree care, golf course maintenance, and specialty turf maintenance. Its customers' properties include corporate and commercial properties, homeowners associations, public parks, hotels and resorts, airport authorities, municipalities, hospitals and other healthcare facilities, educational institutions, restaurants and retail, and golf courses. This segment's customer base includes approximately 11,700 office parks and corporate campuses 10,000 residential communities, and 700 educational institutions. The Development Services segment offers landscape architecture and development services for new facilities and redesign projects. Its services include project design and management services, landscape architecture and installation, irrigation installation, tree moving and installation, pool and water features, sports field, and other services. BrightView Holdings, Inc. also operates as official field consultant to Major League Baseball. The company was formerly known as BrightView Acquisition Holdings, Inc. BrightView Holdings, Inc. was founded in 1939 and is headquartered in Blue Bell, Pennsylvania.

L.B. Foster Company provides engineered and manufactured products and services for the building and infrastructure projects in the United States, Canada, the United Kingdom, and internationally. It operates through two segments: Rail, Technologies, and Services; and Infrastructure Solutions. The Rail, Technologies, and Services segment offers new rail to passenger and short line freight railroads, industrial companies, and rail contractors, as well as used rails; rail accessories, such as rack spikes, bolts, angle bars, tie plates, and other products; insulated rail joints and related accessories; fixation fasteners, coverboards, and special accessories; and trackwork products. This segment also provides engineered concrete railroad ties, friction management products and application systems, railroad condition monitoring systems and equipment including wheel impact load detection systems, wayside data collection and management systems, and rockfall, flood, earthworks, and bridge strike monitoring; and aftermarket services. The Infrastructure Solutions segment manufactures precast concrete products for use as restrooms, concession stands, and protective storage buildings under the CXT brand for national, state, and municipal parks; and manufactures sounds walls, bridge beams, box culverts, septic tanks, and other custom pre-stressed and precast concrete products. This segment also provides steel bridge products; corrosion protection solutions; concrete-reinforced steel grid decking, open steel grid deck, aluminum bridge railing, and stay-in-place steel bridge forms; cuts, threads, and paints pipe; threading services for water well applications; protective pipeline coating services; and turnkey solutions for metering and injection systems for oil and gas markets. L.B. Foster Company was founded in 1902 and is headquartered in Pittsburgh, Pennsylvania.

INNOVATE Corp., through its subsidiaries, operates in infrastructure, life sciences, and spectrum areas in the United States. The Infrastructure segment provides industrial construction, structural steel, and facility maintenance services, such as fabrication and erection of structural steel and heavy steel plate services, and large-diameter water pipes and water storage tanks; fabrication of trusses and girders; and 3-D building information modeling and detailing for commercial, industrial, and infrastructure construction projects, such as buildings and office complexes, hotels and casinos, convention centers, sports arenas and stadiums, shopping malls, hospitals, dams, bridges, mines, metal processing, refineries, pulp and paper mills, and power plants. This segment also offers solutions for digital engineering, modeling and detailing, construction, and heavy equipment installation and facility services including maintenance, repair, and installation; and manufactures pollution control scrubbers, tunnel liners, pressure vessels, strainers, filters, separators, and customized products. The Life Sciences segment develops products to treat early osteoarthritis of the knee; and aesthetic and medical technologies for the skin. The Spectrum segment operates over-the-air broadcasting stations across the United States; and Azteca America, a Spanish-language broadcast network. The company was formerly known as HC2 Holdings, Inc. and changed its name to INNOVATE Corp. in September 2021. The company was incorporated in 1994 and is headquartered in New York, New York.