The New Zealand operation has 40 offices across the country and offers professional consultancy services, covering property and buildings, environment, power and water, transport, health and safety, architecture, sustainability and climate change, and research.

Since then WSP has become one of the largest professional services firms in the world, with approximately 49,000 employees in 550 offices serving in 40 countries, and has acquired over 100 companies.

[1] WSP offers professional services in rail and transport, property and buildings, environment, energy, industry, and resources.

WSP | Parsons Brinckerhoff joined the NZ Transport Agency, Fletcher Construction, McConnell Dowell, Beca, Tonkin + Taylor and Obayashi Corporation to form the Well-Connected Alliance.

WSP Opus was appointed as design partners for the $NZ1.4B Waterview Connection; the final link in Auckland's Western Ring Route and the largest roading project ever undertaken in New Zealand.

The route included two 2.4 km (1.5 mi) twin tunnels and associated motorway and ramp infrastructure, along with the establishment of significant community facilities.

In August 2019 the Link Alliance was awarded the contract to deliver the C3 main works for CRL, including the stations and tunnel.

In September 2019, the NZ Transport Agency and Palmerston North City Council announced development plans for the Te Ahu a Turanga:  Manawatū Tararua Highway.

This 11.5 km (7.1 mi) corridor crosses the Ruahine Ranges immediately north of the Manawatū Gorge and south of Saddle Road.

On 1 November 2018, the Ministry purchased a large block of land from the former Cadbury factory site in the central city to be used for the Dunedin Hospital Redevelopment.