ACS Actividades de Construccion y Servicios is a holding company. Through its subsidiaries, Co.'s activities are divided into the following areas: Construction, engaged in the construction of civil works, and residential and non-residential building construction; industrial services, engaged in the development of applied engineering services, installations and the maintenance of industrial infrastructures in the energy, communications and control systems sectors; services, groups together environmental services, the outsourcing of building maintenance services, logistics and transport services; and concessions, mainly engaged in transport infrastructure concessions.

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.

Jacobs Engineering Group provides services including consulting, technical, scientific and project delivery for the government and private sector. The company's lines of business are: Critical Mission Solutions, which provides cybersecurity, data analytics, software application development, enterprise and mission information technology, systems integration and other technical consulting solutions to government agencies as well as aerospace, automotive and telecom customers; and People and Places Solutions, which provides end-to-end solutions for its clients' projects, whether connected mobility, water, smart cities, manufacturing or the environment.

SAMSUNG ENGINEERING CO., LTD is a Korea-based company principally engaged in the non-chemical engineering business. The Company operates its business through two segments. The Non-chemical segment builds non-chemical plants, including information and communication technology production facilities; industrial plants such as pharmaceuticals, tires, steel and materials; environmental plants related to water circulation, such as water, fresh water and sewage. The Chemical segment constructs plants such as oil refining, petrochemicals, gas, upstream and others.

Southern Cross Electrical Engineering is engaged in the provision of specialized electrical, control and instrumentation installation and testing services for major construction projects with operations in Australia, South America and Africa. Co.'s range of services and expertise offered include constructability review; material procurement, transport and logistics; electrical and instrumentation installation ("E&I"); installation pre-commissioning and commissioning; shutdown maintenance and installations; installation contractual verification documentation; and manufacturers' data and maintenance manuals.

Tetra Tech provides consulting and engineering services that focuses on water, environment, infrastructure, resource management, energy, and international development. The company's segments are: Government Services Group, which supports United States government civilian and defense agencies with services in water, environment, infrastructure, information technology, and emergency management services; and Commercial/International Services Group, which provides infrastructure and related environmental and geotechnical services, testing, engineering and project management services to commercial and local government clients in Canada, Asia Pacific, the United Kingdom, as well as Brazil and Chile.

WSP Global is engaged in offering consulting services ranging from planning to execution, including conceptual and development studies, feasibility and economic studies, preliminary engineering and detailed design, plans and specifications, work supervision, environmental planning and projects and construction management. Co. operates in two geographic segment, Canada and International (Trinidad and Tobago and other countries). Through its subsidiaries, Co. operates in five industries: building, municipal infrastructure, industrial and energy, transportation and environment.