Built to Spec.Delivered on Time.
Adelaide-based civil contracting specialists delivering precision earthworks, drainage, road base, and infrastructure solutions across South Australia.
Core Capabilities
From ground-breaking to final handover — every discipline, one team.
Bulk Earthworks & Excavating
Precision site preparation, clearing, and major cut-and-fill operations.
Civil Reworks
Professional remediation, modifications, and upgrades to existing infrastructure.
Drainage & Pipe Laying
Comprehensive stormwater, sewer, and utility pipeline installation.
Pipe Jacking & Poly Welding
Trenchless pipe installation and certified HDPE pipeline fusion.
Road Base & Concrete Kerbing
Expert subgrade profiling, base compaction, and durable kerb installation.
Retaining Walls
High-durability structural retention built to engineered specifications.
Carting & Water Trucks
Efficient material haulage and dedicated dust suppression or compaction support.
Wet Hire
Clean, compliant equipment alongside certified professionals ready for your project.
Why Choose Tri Sector
Safety Standards
We maintain strict safety protocols on every site, every day. Our team is trained, certified, and committed to getting everyone home safe.
Environmental Compliance
Every project is executed with full environmental compliance — protecting the land we work on and the communities we serve.
Clear Communication
From ground-breaking to final handover, you'll always know where your project stands. No surprises, no excuses.
Ready to Move Ground?
Tell us about your project and we'll get back to you with a tailored quote.