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.

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.

Tetra Tech, Inc. provides consulting and engineering services in the United States and internationally. The company operates through two segments, Government Services Group (GSG) and Commercial/International Services Group (CIG). The GSG segment offers early data collection and monitoring, data analysis and information management, science and engineering applied research, engineering design, project management, and operations and maintenance services; and climate change and energy management consulting, as well as greenhouse gas inventory assessment, certification, reduction, and management services. This segment serves federal, state, and local governments; and development agencies in water resources analysis and water management, environmental monitoring, data analytics, government consulting, waste management, and a range of civil infrastructure master planning and engineering design markets. The CIG segment provides early data collection and monitoring, data analysis and information management, feasibility studies and assessments, science and engineering applied research, engineering design, project management, and operations and maintenance services; and environmental remediation and reconstruction services, and industrial water treatment services. This segment serves natural resources, energy, and utilities markets, as well as sustainable infrastructure master planning and engineering design for facilities, transportation, and local development projects. Tetra Tech, Inc. was founded in 1966 and is headquartered in Pasadena, California.

Fluor Corporation provides engineering, procurement, and construction (EPC); fabrication and modularization; operation and maintenance; asset integrity; and project management services worldwide. The company operates through Energy Solutions, Urban Solutions, Mission Solutions, and Other segments. The Energy Solutions segment provides solutions to the energy transition markets, including asset decarbonization, carbon capture, renewable fuels, waste-to-energy, green chemicals, hydrogen, nuclear power, and other low-carbon energy sources. It also provides consulting services, including feasibility studies, process assessments, and project finance structuring; and a range of services for small modular reactor technologies, conventional and advanced nuclear reactor technologies. This segment serves the production and fuels, chemicals, LNG, power markets, chemicals and petrochemical industries. The Urban Solutions segment offers EPC and project management services to the infrastructure, advanced technologies, life sciences, and mining and metals industries. This segment also provides staffing services to the company and third-party clients with technical, professional, and craft resources on a contract or permanent placement basis. The Mission Solutions segment offers technical solutions to the U.S. and other governments. It also delivers solutions for nuclear security and operation, nuclear waste management, and laboratory management; and operation and maintenance, logistics, EPC, and life support solutions for mission-critical facilities across U.S. military service organizations. This segment offers site management, environmental remediation, and decommissioning for nuclear remediation at governmental facilities, as well as services to commercial nuclear clients. Fluor Corporation was founded in 1912 and is headquartered in Irving, Texas.

Kratos Defense & Security Solutions, Inc. operates as a technology company that addresses the defense, national security, and commercial markets. It operates through two segments, Kratos Government Solutions and Unmanned Systems. The company offers ground systems for satellites and space vehicles, including software for command and control, telemetry, and tracking and control; jet-powered unmanned aerial drone systems, hypersonic vehicles, and rocket systems; propulsion systems for drones, missiles, loitering munitions, supersonic systems, spacecraft, and launch systems; command, control, communication, computing, combat, intelligence surveillance and reconnaissance; and microwave electronic products for missile, radar, missile defense, space, and satellite; counter unmanned aircraft systems, directed energy, communication and other systems, and virtual and augmented reality training systems for the warfighter. The company primarily serves national security-related agencies, the U.S. Department of Defense, intelligence agencies and classified agencies, international government agencies, and commercial customers. Kratos Defense & Security Solutions, Inc. was incorporated in 1994 and is headquartered in San Diego, California.

Oceaneering International, Inc. provides engineered services and products, and robotic solutions to the offshore energy, defense, aerospace, manufacturing, and entertainment industries worldwide. It operates through Subsea Robotics, Manufactured Products, Offshore Projects Group, Integrity Management & Digital Solutions, and Aerospace and Defense Technologies segments. The company offers remotely operated vehicles (ROVs) for drill support and vessel-based services, including subsea hardware installation, construction, pipeline inspection, survey and facilities inspection, maintenance, and repair; ROV tooling; and survey services, such as hydrographic survey, positioning services, and autonomous underwater vehicles for geoscience. It also provides distribution and connection systems, including production control umbilicals and field development hardware, pipeline connection, and repair systems to the energy industry; and autonomous mobile robotic technology and entertainment systems to various industries. In addition, the company offers subsea installation and intervention, including riserless light well intervention inspection, maintenance, and repair services; installation and workover control systems, and ROV workover control systems; diving services; project management and engineering; and drill pipe riser services and systems, and wellhead load relief solutions. Further, it provides asset integrity management, software and analytical solutions for the bulk cargo maritime industry, and software, digital, and connectivity solutions for the energy industry, as well as government services and products, including engineering and related manufacturing in defense and space exploration activities to the United States' government agencies and their prime contractors. Oceaneering International, Inc. was founded in 1964 and is headquartered in Houston, Texas.

Kelly Services, Inc., together with its subsidiaries, provides workforce solutions to various industries. The company operates through five segments: Professional & Industrial; Science, Engineering & Technology; Education; Outsourcing & Consulting; and International. The Professional & Industrial segment delivers staffing, outcome-based, and permanent placement services providing administrative, accounting, and finance; light industrial; contact center staffing; and other workforce solutions. The Science, Engineering & Technology segment offers staffing, outcome-based, and permanent placement services in the areas of science and clinical research, engineering, technology, and telecommunications specialties. The Education segment provides staffing, permanent placement, and executive search services to pre-K-12 school districts and education organizations. The Outsourcing & Consulting segment offers managed service provider, recruitment process outsourcing, payroll process outsourcing, and executive coaching programs to customers on a global basis that includes its RocketPower brand. The International segment provides staffing, recruitment process outsourcing, and permanent placement services. The company serves customers in the United States, Canada, Mexico, Puerto Rico, France, Switzerland, Portugal, Russia, Italy, rest of Europe, and the Asia-Pacific region. Kelly Services, Inc. was founded in 1946 and is headquartered in Troy, Michigan.

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.