Industry Leading Geotechnical Engineering & Environmental Consulting Services
Whether you are building a new development or assessing an existing property you have to be reassured that your asset is protected against the potential risks posed by your location’s geological and environmental factors.
With over 35 years of experience and more than 29,000 successful projects under our belt you can trust our geotechnical engineers and environmental scientists to provide cost effective solutions for your project. We can identify the potential issues affecting your site such as landslide risks, acid sulfate soils, and contamination.
The Markets We Service
We can customise our reports to your specifications, allowing you to meet challenging site conditions or development application requirements.
Working together we are able to tailor our capabilities for:
- Residential
- Commercial and Industrial
- Infrastructure
- Construction
- Legal and Insurance
- Councils, Government and Education
Our Extensive Range of Services
As leaders in geotechnical engineering, environmental consulting, site investigations, soil testing and drilling services JK Group have the breadth of capabilities and experience to guide you through your development whatever the size, from concept to construction.
Our extensive range of projects has enabled us to establish an impressive database of subsurface conditions across the wider Sydney metropolitan area. This provides us a unique understanding of your site going into the project, meaning more accurate and cost effective quotes for you.
Our services are provided by our four divisions:
- JK Geotechnics: The geotechnical engineering division
- Environmental Investigation Services (EIS): The environmental consultant division, providing specialist advice such as site contamination reports
- Soil Testing Services (STS): Comprises our team of geotechnicians providing earthworks and laboratory soil testing services
- SoilCheck: Operates our fleet of drill rigs and other site investigation plant and equipment
Get in Touch
For all your geotechnical, environmental, site investigation and soil testing requirements, don’t hesitate to call us on (02) 9888 5000 or enquire online.

Since our establishment in 1976, as Jeffery and Katauskas Pty Ltd, it has been our goal to help individuals, developers, architects, structural and civil engineers, local and state government bodies identify potential geotechnical and environmental problems.
The JK Group is a proudly employee owned and managed company that values professionalism through honesty, dependability and integrity. We strive for excellence in practical, innovative and value added solutions.
Environmental Investigation Services
Discover how EIS can help you select the right type of investigation and contamination report to satisfy your requirements.
Selecting the right drill rig for sensitive and complex subsurface conditions can be difficult. Discover how we make it easy.