Knowledge Below,
Confidence Above
Utility Location and Geotechnical Support Services Across Nelson & the Top of the South.
Accurate underground service detection and practical geotechnical support for engineers, contractors, councils, and developers.
We help you reduce risk, avoid costly surprises, and move projects forward with confidence.
Utility Location Services
Accurate detection of underground services before you dig
Our utility location services identify known and unknown underground infrastructure using advanced detection methods. This reduces the risk of service strikes, delays, and costly rework.
Geotechnical Support
Practical geotechnical support from investigation to construction
We provide professional geotechnical support services that integrate seamlessly with engineering, construction, and consent processes. Our focus is on accurate field data, clear documentation, and practical site support.
Who We Work With
The team at SSGS work with civil and geotechnical engineers, contractors, surveyors, developers, councils, and asset owners across Nelson and the Top of the South. We integrate seamlessly into project teams, providing utility locating and geotechnical support that aligns with programme, safety, and compliance requirements.
Whether supporting residential, commercial, or infrastructure projects, our role is to deliver practical subsurface information that enables confident decisions on site.
Why Choose SSGS
SSGS provides engineering-led utility locating and geotechnical support with direct technical accountability from field investigation through to final output. Based in Nelson, we combine strong local knowledge with conservative, defensible interpretation and clear communication of limitations.
The focus is always on delivering the right level of investigation at the right time — reducing risk and helping projects move forward with confidence.
What Our Clients Are Saying
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“Ryan brings a level of practical judgement that’s rare in subsurface investigations. The information provided was clear, defensible, and directly usable in our design process. His understanding of both ground conditions and construction realities made a real difference to the project.”
— Senior Civil Engineer, Nelson
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“SSGS provided accurate service locating ahead of excavation and clearly communicated the limitations. The site markings were precise, and the reporting was straightforward. It gave our team confidence to proceed without second-guessing what was below ground.”
— Project Manager, Civil Contractor
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“We engaged SSGS early in the project to reduce risk before drilling works began. The advice was practical, measured, and scaled appropriately to the site. Having direct access to an experienced engineering geologist made the process efficient and reassuring.”
— Property Developer, Tasman Region