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At Tonkin + Taylor, we recognise that testing, instrumentation, earthworks, and site inspections are fundamental aspects for a successful project. These services are crucial to ensure that your project is conducted safely, efficiently, and in compliance with all applicable regulations.

Our team of experienced engineers and technicians are equipped with the latest technology and industry expertise to provide comprehensive and bespoke solutions that meet your unique requirements. We work closely with our clients to understand their needs and tailor our services to meet their specific requirements.

We offer a range of testing services to help you assess site conditions and materials and to ensure that your construction activities are conducted effectively. Our instrumentation services help to monitor the behaviour of structures and materials during construction, providing real-time data for analysis and decision-making.

Our earthworks services involve careful planning and execution to ensure that the site is prepared to support the intended structure or infrastructure, and our site inspections help to ensure that construction activities are conducted safely and in compliance with regulations.

We’re committed to delivering high-quality, reliable, and cost-effective solutions for your engineering projects.


  • Construction monitoring
  • Field investigations
  • Field data capture
  • Sonic borehole drilling
  • Ground investigation including cone penetration testing and seismic dilatometer Marchetti tests
  • Barge-based machine borehole drilling
  • Hydro-excavation
  • Test pits

Recent Projects

Coffs Harbour Bypass Investigation

Coffs Harbour Bypass Investigation


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