Our Solutions

Engineered Solutions.
Built by one team.

Every project is designed and built by our own crews — no subcontracting, no handoffs, no split accountability. GSI NZ brings together geohazard engineering, ground engineering, and specialist grouting under one roof. The same geotechnical engineers who assess your hazard produce the construction-ready design, and the same field crews who build it are on site from day one through to final sign-off.

Whether you need a rapid emergency response or a fully engineered long-term solution, we deploy purpose-built equipment and IRATA-certified rope access crews to sites other contractors cannot reach. Our fleet — drill rigs, grouting plant, slope protection systems, and CFA piling rigs — is owned and maintained in-house, which means we mobilise on our own schedule, not a hire company's.

GSI has been operating in New Zealand since 2017, when unprecedented demand following the Kaikōura earthquake led to the establishment of a permanent New Zealand operation. That operation was strengthened in 2019 through the acquisition of Hiway Geotechnical, which brought deep ground engineering capability (CFA piling, jet grouting, in-situ mass stabilisation, and in-situ trench mixing) under the GSI roof. Today, our New Zealand team holds more specialist geotechnical capabilities in-house than any other firm operating in the country.

We are NZ Transport Agency Waka Kotahi pre-qualified for State Highway geotechnical and slope works, SiteWise Gold accredited, and a Totika listed supplier. Our engineers are active members of the New Zealand Geotechnical Society, and our rope access technicians hold IRATA certification to Level 3. When a slope fails or ground shifts — on a state highway, a commercial development, or a residential section — GSI is the team that gets called first.