Quanta Services, Inc. provides infrastructure solutions for the electric and gas utility, renewable energy, communications, and pipeline and energy industries in the United States, Canada, Australia, and internationally. The company's Electric Power Infrastructure Solutions segment engages in the design, procurement, construction, upgrade, repair, and maintenance of electric power transmission and distribution infrastructure and substation facilities; installation, maintenance, and upgrade of electric power infrastructure projects; installation of smart grid technologies on electric power networks; and design, installation, maintenance, and repair of commercial and industrial wirings. This segment also offers aviation services; emergency restoration services; and other engineering and technical services; design and construction solutions to wireline and wireless communications, cable multi-system operators, and other customers; and training for electric workers, as well as training for the gas distribution and communications industries. The company's Renewable Energy Infrastructure Solutions segment is involved in engineering, procurement, construction, repair, and maintenance of wind, solar, and hydropower generation facilities, as well as battery storage facilities; and provision of engineering and construction services for substations and switchyards, transmission, and other electrical infrastructures. The company's Underground Utility and Infrastructure Solutions segment offers design, engineering, procurement, construction, upgrade, repair, and maintenance services for natural gas systems for gas utility customers; fabrication services for pipeline support systems and structures and facilities; and engineering and construction services for pipeline and storage systems, and compressor and pump stations. The company was formerly known as Fabal Construction, Inc. and changed its name to Quanta Services, Inc. in November 1997. The company was incorporated in 1997 and is headquartered in Houston, Texas.

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.

Jacobs Solutions Inc. provides consulting, technical, engineering, scientific, and project delivery services for the government and private sectors in the United States, Europe, Canada, India, Asia, Australia, New Zealand, the Middle East, and Africa. It operates through Critical Mission Solutions, People & Places Solutions, Divergent Solutions, and PA Consulting segments. The company offers cyber, data analytics, systems and software application integration and consulting, enterprise level and mission IT, design, nuclear, and enterprise level operations and maintenance services; software development, testing, mission integration, program management, research, development, test, evaluation services, training, and environmental remediation services; and other technical consulting solutions, as well as construction and construction management services. It also provides consulting services for consumer and manufacturing, defense and security, energy and utilities, financial services, government, health and life sciences, and transport industries. The company was founded in 1947 and is headquartered in Dallas, Texas.

KBR, Inc. provides scientific, technology, and engineering solutions to governments and commercial customers worldwide. It operates through Government Solutions and Sustainable Technology Solutions segments. The Government Solutions segment offers life-cycle support solutions to defense, intelligence, space, aviation, and other programs and missions for military and other government agencies in the United States, the United Kingdom, and Australia. Its services cover research and development, advanced prototyping, acquisition support, systems engineering, cyber analytics, space domain awareness, test and evaluation, systems integration and program management, global supply chain management, and operations readiness and support, as well as command, control, communications, computers, intelligence, surveillance, and reconnaissance services. This segment also provides various professional advisory services to the defense, renewable energy, and critical infrastructure sectors. The Sustainable Technology Solutions segment operates portfolio of various proprietary process technologies for ammonia/syngas, chemical/petrochemicals, clean refining, and circular process/circular economy solutions. This segment also provides synergistic services, including advisory and consulting focused on broad-based energy transition and net-zero carbon emission solutions; high-end engineering, design and program management centered around decarbonization, energy efficiency, environmental impact and asset optimization; and digitally-enabled operating and monitoring solutions. KBR, Inc. was founded in 1901 and is headquartered in Houston, Texas.

Flowserve Corporation designs, manufactures, distributes, and services industrial flow management equipment in the United States, Canada, Mexico, Europe, the Middle East, Africa, and the Asia Pacific. It operates through Flowserve Pump Division (FPD) and Flow Control Division (FCD) segments. The FPD segment offers custom and pre-configured pumps and pump systems, mechanical seals, auxiliary systems, replacement parts, upgrades, and related aftermarket services; and equipment services, including installation and commissioning services, seal systems spare parts, repairs, advanced diagnostics, re-rate and upgrade solutions, retrofit programs, and machining and asset management solutions, as well as manufactures a gas-lubricated mechanical seal for use in high-speed compressors for gas pipelines and in the oil and gas production and process markets. The FCD segment provides engineered and industrial valve and automation systems, including isolation and control valves, actuation, controls, and related equipment; and equipment maintenance services for flow control systems, including advanced diagnostics, repair, installation, commissioning, retrofit programs, and field machining capabilities. This segment's products are used to control, direct, and manage the flow of liquids, gases, and multi-phase fluids. It primarily serves oil and gas, chemical and pharmaceuticals, power generation, and water management markets, as well as general industries, including mining and ore processing, pulp and paper, food and beverage, and other smaller applications. The company distributes its products through direct sales, distributors, and sales representatives. Flowserve Corporation was founded in 1790 and is headquartered in Irving, Texas.

Primoris Services Corporation, a specialty contractor company, provides a range of specialty construction, fabrication, maintenance, replacement, and engineering services in the United States and Canada. The company operates through Utilities and Energy/Renewables segments. The Utilities segment offers installation and maintenance services for new and existing natural gas distribution systems, electric utility distribution and transmission systems, and communications systems. The Energy/Renewables segment provides a range of services, including engineering, procurement, and construction, as well as retrofits, highway and bridge construction, demolition, site work, soil stabilization, excavation, flood control, upgrades, repairs, outages, and maintenance services to renewable energy and energy storage, renewable fuels, petroleum, and petrochemical industries, as well as state departments of transportation. It also offers pipeline construction and maintenance, and storage services; pipeline facility, and integrity services. Primoris Services Corporation was founded in 1960 and is headquartered in Dallas, Texas.

Matrix Service Company provides engineering, fabrication, construction, and maintenance services to support critical energy infrastructure and industrial markets in the United States, Canada, and internationally. The company's Storage and Terminal Solutions segment undertakes work related to aboveground crude oil and refined product storage tanks and terminals; engineering, procurement, fabrication, and construction services related to cryogenic, specialty tanks, and terminals for LNG, NGLs, hydrogen, ammonia, propane, butane, liquid nitrogen/liquid oxygen, and liquid petroleum; and provides plant work, truck and rail loading/offloading facilities, and marine structures, as well as storage tank and terminal maintenance and repair. This segment offers engineered specialty tank products, including geodesic domes, aluminum internal floating roofs, floating suction and skimmer systems, roof drain systems, and floating roof seals. Its Utility and Power Infrastructure segment offers power delivery services, including construction of new substations, upgrades of existing substations, transmission and distribution line installations, and upgrades and maintenance, and emergency and storm restoration services. This segment provides engineering, fabrication, and construction services for LNG utility peak shaving facilities; and construction and maintenance services to power generation facilities, including natural gas fired facilities. The company's Process and Industrial Facilities segment offers plant maintenance and turnarounds for refining and processing of crude oil, fractionating, and marketing of natural gas and natural gas liquids; engineering, procurement, fabrication, and construction for refinery upgrades and retrofits for hydrogen processing, production, loading, and distribution facilities; and constructs thermal vacuum test chambers for aerospace and defense, and other industries. The company was founded in 1984 and is headquartered in Tulsa, Oklahoma.

ENGlobal Corporation provides engineering and professional project execution services primarily to the energy sector in the United States and internationally. It operates in two segments, Commercial and Government Services. The Commercial segment provides multi-disciplined engineering services and fabrication relating to the development, management, and execution of projects requiring professional engineering and related project management services. It offers conceptual studies, project definition, cost estimating, engineering design, environmental compliance, material procurement, project management, construction management, and fabrication services. The Government Services segment provides design, integration and implementation of process distributed control and analyzer systems, advanced automated data gathering systems, information technology, and the maintenance of these systems; and electrical and instrument installation, technical services, ongoing maintenance, calibration, and repair services. It also provides services related to the engineering, design, installation, and maintenance of automated fuel handling and tank gauging systems for the United States military. The company serves Fortune 500 companies in the energy industry and the United States government. The company was formerly known as Industrial Data Systems Corporation and changed its name to ENGlobal Corporation in June 2002. ENGlobal Corporation was founded in 1985 and is headquartered in Houston, Texas.