The Cobham Bridge, Kaitoke Prison, Whanganui City College tower block and the "criss-cross" building in central Whanganui all have something in common.
They're among some of the most recognised local projects involving a company that's been around for 150 years.
That company was originally the Public Works Department then evolved into Ministry of Works, Works Consultancy Services, Opus, WSP Opus, and now WSP.
WSP's Whanganui business manager Jenny Harrison said the Whanganui office, along with the rest of WSP, is celebrating the 150th anniversary of the company in Aotearoa New Zealand.
"In Whanganui the shape of our business has changed over the years reflecting the projects we have been working on and the clients we have worked for," Harrison said.