Construction, renovation, installation, maintenance, and repair services for commercial, residential, governmental, retail, industrial, and manufacturing buildings; construction, renovation, installation, maintenance, and repair services for traffic and transport facilities and infrastructure, namely railways, highways, bridges, dams, airports and harbors; construction, renovation, installation, maintenance, and repair services for ports, dams, waterway, river, dredging, sanitation facilities, sediment depots, aquatic disposal facilities, coastal and flood control facilities and infrastructure; construction, renovation, installation, maintenance, and repair services for recreation, coastal protection, and land reclamation; construction, renovation, installation, repair and maintenance for water treatment and purification installations and plants; construction, renovation, installation, maintenance, and repair services for irrigation, drainage, groundwater, surface water, and wastewater management, water treatment, hydrologic and water quality monitoring facilities and infrastructure; and construction, renovation, installation, maintenance, and repair services for specialized premises, commercial and industrial works, facilities, and infrastructure.

Architectural design, design, and engineering services in the fields of commercial, industrial, and governmental facilities and infrastructure, ground, water and public transportation, air transportation, port, harbor, and aviation facilities and infrastructure; architectural design and engineering consulting, analysis and design services in the field of highways, streets, roads, tunnels, bridges, right-of-way and traffic management; design and engineering services in the field of traffic management and control, namely adaptive traffic signal controls, tunnel and bridge signaling, and traffic rerouting, emergency and warning signaling and controls; consulting and analysis for environmental protection, namely, detection of contaminants in water and technical consultation in the field of environmental science; design and engineering consulting and analysis services for water irrigation, drainage, treatment, monitoring, transportation and infrastructure; contract and operational architectural design, design in the field of water treatment, monitoring, transportation and infrastructure; engineering and structural design services in the field of commercial, industrial, and governmental buildings and infrastructure; architectural design, design in the field of structural design for commercial, industrial, special use premises, and governmental facilities and infrastructure, highways, streets, roads, tunnels, bridges, right-of-way, water irrigation, drainage, pipelines for water supply, treatment, purification, monitoring, and transportation, and engineering services; engineering analysis, research, planning, and technical engineering consultancy services; planning, design, and engineering in the field of pipelines for water supply, drainage, and irrigation, water purification installations, waste treatment plants, waste water and fresh water plants, and sanitation, sediment depots, aquatic disposal and waste destruction facilities and infrastructure; hydraulic and geotechnologic engineering analysis; technical consulting services in the field of architectural design and engineering in the layout of commercial, industrial, special use, and governmental facilities and premises; technical consulting in the field of environmental engineering, and preparing environmental compliance reports, namely, preparing technical reports and environmental impact statements; architectural design, design, and engineering consultancy services concerning security and survivability of commercial, industrial, and public facilities and infrastructure, ground, water and air transportation facilities and pipelines.