Jeffery & Katauskas Pty Ltd

Jeffery & Katauskas Pty Ltd has been delivering geotechnical, environmental, and drilling solutions since 1976. We are a proudly employee-owned company built on professionalism, dependability, and integrity. With more than 36,000 projects completed, we have established a reputation for practical and innovative approaches across residential, commercial, and infrastructure developments. Our team is highly trained, accredited, and supported by structured mentoring and industry partnerships, ensuring we deliver the highest technical standards. We are committed to quality, safety, and environmental compliance, with systems certified to AS/NZS ISO standards. Our divisions—JK Geotechnics, JK Environments, JK Drilling, and Soil Test Services—work together to provide end-to-end expertise. By combining experience, innovation, and strong client relationships, we continue to provide solutions that meet complex challenges with confidence.

• Geotechnical engineering and engineering geology
• Environmental assessments, contamination reports, and acid sulfate soil studies
• In-situ soil testing, monitoring, and hydrogeology services
• NATA-accredited soil laboratory testing and earthworks control
• Drilling, site investigations, and sampling
• Pavement design, landslide risk assessments, and forensic investigations
• Expert witness and technical verification services