Opus International Consultants Limited provides infrastructure consultancy and project management services for government and quasi-government sector in New Zealand, Canada, United States, United Kingdom, and Australia. It offers services for the building sector which include architecture; asset management; building; compliance; geotechnical; heritage; landscape architecture and urban design; property; structural design; and surveying services. The company also provides services in the transportation sector, including asset and network management, bridge design, geographic information systems, geotechnical, maritime engineering, procurement and contract management, rail and road design, transport planning, and transportation research services. In addition, it offers environmental training, rural, storm water management, wastewater treatment, water asset management, and water treatment services, as well as environmental management, contaminated land, resource management planning, and archeology services; and infrastructure development and management services. Further, the company provides various services for energy sector in the energy distribution, generation, and management areas, as well as in the oil and gas areas. Additionally, it provides data center, fixed network, and mobile and wireless infrastructure services; research, specialist consultancy, and laboratory services in the areas of buildings, structures, and utilities, as well as in environmental, society and business, and transportation sectors; and test reports, specialist independent consulting, and materials testing and analysis services for engineering construction materials. The company was formerly known as Works Consultancy Services Corporation NZ Limited and changed its name to Opus International Consultants Limited in April 1997. The company was founded in 1870 and is based in Wellington, New Zealand with additional offices in New Zealand, Australia, Canada, United Kingdom, and United States. As of November 27, 2017, Opus International Consultants Limited operates as a subsidiary of WSP Global Inc.