We're straight-talking geotechnical engineers who are passionate about what we do.
Meet our Team
Rhys Mathews
TECHNICAL EXPERTISE
Geotechnical investigations, foundation design, earthworks supervision, retaining structures, ground improvement and piling. Experienced across AS 1726, AS 3798, AS 2870 and AS 2159.
CAREER JOURNEY
Founded TERRATECH to deliver senior-led, practical geotechnical advice clients can build from. Holds an Honours double degree in Engineering and Geology from the University of Adelaide, with prior roles at Golder Associates and Menard Oceania on major infrastructure and ground improvement projects.
SECTOR EXPERIENCE
Spans renewable energy, road and rail infrastructure, and mining. A well-rounded understanding of the practical constraints and regulatory requirements unique to each industry.
Our Founder & Lead Geotechnical Engineer
Chartered Engineer · CPEng · NER· 10 years
Samuel Brown
Associate Geotechnical Engineer
MIEAust· Engineers Australia· 9 years
TECHNICAL EXPERTISE
Geotechnical site investigations to AS 1726, field and laboratory testing, and geotechnical analysis and reporting. Manages multiple drilling teams and contractors across sensitive, remote and difficult-access sites, with a strong HSE and risk management focus.
CAREER JOURNEY
Built a nine-year career at WSP (formerly Golder), progressing from hands-on field and laboratory testing through to Senior Geotechnical Engineer. Holds a Bachelor of Civil and Environmental Engineering, with tier-1 project delivery for BHP, SA Water and the Department for Infrastructure and Transport.
SECTOR EXPERIENCE
Spans renewable energy, road and rail, water infrastructure, and mining. A well-rounded background delivering across some of South Australia's most demanding sites and sectors.
Approach to Engineering
TERRATECH delivers geotechnical consulting that supports safe, efficient and sustainable development across South Australia. Our engineers and field specialists provide detailed site investigations, soil classification reports and groundwater assessments for developers, architects, builders and local government.
Practical, Site-Specific Solutions
Construction runs on tight timelines, evolving designs and budget pressure. Our reporting is built around that reality, with clear and actionable guidance on earthworks, footing systems, site preparation and groundwater management.
Technically Sound, Clearly Communicated
We apply proven engineering methods and current industry practice, then write it up so every stakeholder can use it, including planners, certifiers and builders.
Responsive and Collaborative
Every site is different. Reactive clays, variable fill, shallow groundwater or difficult terrain each change the approach, so we tailor ours to your conditions and work closely with your broader design and construction team.
Trusted Supervision Built to Australian Standards
We deliver bulk earthworks supervision and geotechnical investigations that meet Australian Standard requirements.
AS 3798-2007 compliant Level 1 and Level 2 earthworks supervision
Senior-led investigations, so the person on site is the person signing the report
Full adherence to AS 1726-2017, supporting confident design and construction decisions