Alliance is a full-service geotechnical and environmental consultancy with in-house NATA-aligned geotechnical laboratories. We provide:

• Geotechnical engineering: Site investigations, drilling and sampling, foundation and footing recommendations, slope stability assessments, pavement design, earthworks control, and geotechnical risk management.
• Environmental consulting: Preliminary and Detailed Site Investigations (PSI/DSI), contamination assessments, remediation action plans (RAP), waste classification, acid sulfate soils assessments, and environmental monitoring.
• Laboratory testing: Comprehensive soil, rock, aggregate and construction materials testing to relevant Australian Standards across our Seven Hills (Sydney), Bellambi (Wollongong) and Gold Coast facilities.

We support projects across residential, commercial, industrial, infrastructure and local government sectors – delivering fast, reliable and practical advice with an emphasis on buildability and compliance.

Alliance operates multiple offices and laboratories to service Sydney and NSW, the Illawarra, and South-East Queensland:

• Seven Hills (North-West Sydney) – Main office and geotechnical testing laboratory
• Wollongong (Illawarra region) – Field operations and laboratory services
• Gold Coast (South-East QLD) – Consulting team and materials testing lab

This network enables responsive turnaround times, local knowledge of ground conditions, and cost-effective logistics across nearby councils and development precincts.

We’ve been operating since 2003, building a reputation for technical rigor, practical design advice and exceptional client service. Our long-standing presence in Sydney and our recent expansion into Wollongong and the Gold Coast means our team brings decades of local geotechnical and environmental experience – from sedimentary basins and weathered shales to coastal sands and volcanic formations – directly to your project.

Alliance works across:

• Property development – Subdivisions, mixed-use, multi-residential, commercial
• Construction – Foundations, earthworks, retaining structures, pavements
• Infrastructure – Roads, bridges, utilities, rail, ports
• Industrial – Warehousing, logistics, manufacturing
• Local & state government – Public works, community assets, compliance
• Environmental remediation – Contaminated land, waste classification, RAP implementation

Whether your project is in metro Sydney, regional NSW, the Illawarra or Gold Coast, our integrated field, lab and advisory teams ensure a smooth path from investigation to delivery.

Yes. Alliance’s testing and consulting adhere to relevant Australian Standards, industry codes and regulatory guidelines applicable to NSW and QLD projects. Our laboratories and reporting practices are aligned with best-practice QA/QC to support planning approvals, certification, and construction compliance.