Raising standards. Building legacy.
Northland's civil construction and tree management specialists.
Built in Northland. Built for Northland.
OS Group is a family-built business with deep roots in the Far North. Founded by the O'Rourke family, we've spent years delivering civil construction and tree management projects that communities across Northland rely on every day from roading and earthworks to vegetation clearing and public spaces.
We are Northlanders working hard for Northland. We're not a big Auckland firm parachuted in. We live here, we work here, and we're invested in the future of this region.
Our current area of operation covers Te Taitokerau from Cape Reinga to Wellsford, with bases in Kaitaia, Kerikeri and Dargaville — meaning our teams can mobilise rapidly across the Far North.
The people behind the work
Every project we deliver comes down to the people doing it. We invest in our team, we back them to make good decisions, and we build a culture where safety and quality aren't negotiable.
We're Northlanders — we live in the communities we work in. That means the roads we build, the trees we manage and the spaces we create are ones our own families use every day.
Our Team
David O’Rourke Manager OS Construction
Dan O’Rourke Manager OS Safetree
Dan Hogg Site Lead
David O’Rourke OS Safe Tree
Te Atarangi Glen Health and Safety Manager
Safety first.
If it's not safe, it doesn't happen.
Every OS Group team member goes home safe. That's not a target — it's a non-negotiable.
From pre-works planning to on-site execution, health and safety is built into everything we do. Our teams are trained, prepared and empowered to stop work if something isn't right.
“OSC’s focus on Health & Safety, environmental and cultural matters was exacting. They have created a safety culture within their business that permeates all aspects of their work and engagement. Their commitment to Health and Safety provided us with the confidence we required.”
“Please pass on my compliments to all of the OS Construction team, especially those on site — a well run project, tidy site, production underway and no issues arising.”
“OSC have developed an excellent working relationship with our onsite cultural monitors and local hapū, Ngāti Rēhia. No environmental incidents were reported during their time onsite. OS Construction Ltd proved to be both professional and solutions focused.”
“I have talked with riders who recently rode the new section of the Mamaranui Cycleway in Dargaville — they say it is absolutely perfect!”