STS Geotechnics (STS) has provided a NATA accredited soils, aggregate and rock testing laboratory in western Sydney since 2020.

Our laboratory undertakes a wide range of test methods to relevant Australian / RMS Standards for all aspects of small and large civil engineering projects. Our laboratory team, under the direction of our laboratory manager, Mr Orlando Mendoza also combine a wide range of field testing services to complement the in-house laboratory.

STS implements and audits a comprehensive Quality Assurance system together with participation in various proficiency testing programs to ensure our product remains complaint with relevant standards and our reporting meets project deadlines.



Our commonly requested tests include:

  • Atterberg Limits and Linear Shrinkage
  • CBR
  • Particle Size Distribution & Hydrometer
  • Stabilised UCS testing of pavement materials
  • Shrink Swell
  • Rock UCS
  • MDD / OMC
  • Large and Small Shearbox


  • Level 1 Supervision
  • Level 2 Testing (Compaction)
  • Compaction by sand replacement
  • Proof Roll Inspections
  • Material sampling use hydraulic auger drilling rigs
  • Rock UCS
  • Dynamic Cone and Perth Sand Penetrometer Testing


  • Camden Council
  • Hornsby Shire Council
  • McDonald Jones Group
  • NSW Land & Housing Corporation
  • Campbelltown City Council
  • Lamond Contracting
  • Blacktown City Council
  • The Hills Shire Council
STS undertakes a wide range of specialist testing. Please contact STS for a full list of our NATA accreted test methods. Our sister company, EI Australia provides wide range of environmental services