Quarry & Source Rock Testing
We provide detailed assessments of source materials to ensure suitability and compliance with project specifications and standards.
A Little About Us
C&T Geotechnical is a trusted provider of comprehensive geotechnical and materials testing services across the construction, infrastructure, and resource sectors. With a strong focus on quality, accuracy, and reliability, we support our clients through every stage of their projects — from initial investigation to final certification.
Backed by a team of experienced engineers, technicians, and field professionals, we deliver practical solutions and high-quality data to ensure safe, efficient, and compliant project outcomes. Our tailored services are designed to meet the unique needs of each client, whether it’s for major infrastructure developments or local quarry assessments.
Why use us?
C&T Geotechnical is known for its dependable turnaround times, meticulous attention to detail, and a commitment to delivering results that clients can trust. Our team of experienced technicians and engineers bring practical knowledge and a solutions-focused approach to every project, whether it’s a local development or a major infrastructure upgrade. We work closely with contractors, consultants, and developers to provide testing services that help keep projects compliant, on time, and on budget.
Benefits of our specialist skills
Our specialist skills set us apart—bringing a depth of technical knowledge and hands-on experience that ensures precise, reliable results every time. Our team is equipped to handle complex materials testing and geotechnical challenges, offering tailored solutions that go beyond standard compliance. Whether it’s detailed source rock analysis or advanced lab testing for critical infrastructure, our expertise helps clients reduce risk, improve construction quality, and make informed decisions with confidence.
How we can help you
Combining our expertise in Geotechnical Investigations, Laboratory Testing, and Consultancy Services, we provide end-to-end support that helps clients make informed decisions, ensure compliance, and achieve successful project outcomes from the ground up.
Engineering Lab Services
Tailored testing solutions and advanced analysis for complex or non-standard materials and site conditions.
Consultancy Services
Whether you’re troubleshooting a site issue or seeking proactive design input, our team works closely with clients to deliver practical, cost-effective solutions.
Compaction Control & Level 1 Testing
Accurate on-site testing to verify compaction levels and ensure compliance with design requirements.
Earthworks, Pavement Testing & Certification
Compaction Control & Level 1 Testing (AS 3798)
At C&T Geotechnical, we specialise in compaction control and Level 1 inspection and testing for projects of all sizes – from residential subdivisions to major road and rail infrastructure.
- On-site density and moisture testing
- AS 1289 Standard & Modified compaction testing
- Full-time Level 1 supervision in accordance with AS 3798
- Detailed reporting and rapid turnaround
- Council-compliant earthworks certification
We are pre-qualified on the Department of Transport Register of Testing Companies and actively support major road and rail infrastructure projects across Victoria.
Geotechnical
Our Geotechnical Investigation services provide critical insight into subsurface conditions, helping to inform safe, practical, and cost-effective design and construction decisions. From soil profiling and site classification to foundation recommendations and pavement design support, our experienced team delivers accurate, timely data that reduces risk and ensures compliance with relevant standards. Whether for residential, commercial, or large-scale infrastructure projects, we help clients build with confidence from the ground up.
FIND OUT MORELaboratory
Our Laboratory Testing services offer precise, accredited analysis of construction materials including soil, rock, concrete, asphalt, and aggregates. Using modern equipment and rigorous testing methods, we ensure all materials meet the required specifications and industry standards. From compaction and moisture content to strength and durability, our lab results provide the essential data needed to verify quality, maintain compliance, and support successful project delivery.
FIND OUT MOREConsultancy
Our Consultancy Services provide expert guidance across all stages of a project, from planning and investigation to construction and compliance. With deep technical knowledge and practical field experience, we offer tailored advice on material suitability, ground conditions, pavement design, and construction methodologies. Whether you're troubleshooting a site issue or seeking proactive design input, our team works closely with clients to deliver practical, cost-effective solutions that support long-term project success.
FIND OUT MOREMeet our team
At the helm of C&T Geotechnical is a highly experienced leadership team comprised of Chris Mamalis, Tim Senserrick, Gee Singh and Tim Hodgson—four directors who bring a wealth of knowledge, technical expertise, and industry insight to every project.
C&T Geotechnical South West Chris Mamalis is the Director at CT Geotechnical, with over 20 years of experience in geotechnical, pavement, and materials engineering across both the public and private sectors. Prior to founding CT Geotechnical, Chris spent over 10 years with VicRoads (Department of Transport), where he served as Team Leader – Field Investigation…
With over 20 years of experience in the construction material testing industry, Tim Senserrick has built a reputation for technical expertise, leadership, and a strong commitment to quality and client satisfaction. He began his career in the laboratory, developing a solid foundation in material testing methods before transitioning into site-based roles, where he focused on residential,…
Director | Senior Geotechnical Engineer BE (Hons) Civil | MIEAust | NER | RPEng Gee Singh is a founding Director of C&T Consulting Engineers and a senior geotechnical engineer with over 15 years of experience. Beginning his career in the field undertaking borehole logging, soil testing, and close collaboration with contractors, Gee developed a practical,…
Director | Senior Engineering Geologist BSc (Geology & Geography), PGDipSci (Geology) Tim is a highly experienced senior engineering geologist and co-director of C&T Consulting Engineers. With over 14 years of geotechnical and geological experience across New Zealand and Australia, he brings deep technical insight and a practical, client-focused approach to every project. He specialises in…
Tom Seitz – Geotechnical Engineer C&T Geotechnical South West Tom is a Geotechnical Engineer and has over eight years of experience in the Civil Engineering Industry, with a strong foundation across geotechnical engineering, traffic engineering and project management. Tom thrives on the versatility his work offers and enjoys the opportunity to engage directly with clients…
Michael currently holds the position of Geotechnical Engineer at C&T Geotechnical South West. He has over 5 years of experience in the geotechnical engineering field. Majoring his study in Geology and originally intending to enter the mining industry, Michael has pivoted into the civil construction industry and has since enjoyed working on a wide range…
C&T Geotechnical South West Gus Donovan is the Team Leader of Quarry & Source Rock Testing at CT Geotechnical, bringing over 8 years of experience in construction materials testing and a strong background in quarry-based quality assurance. Gus oversees the coordination and delivery of a wide range of source rock compliance tests for quarries supplying materials to major…
C&T Geotechnical South West Brent Elliott is the Laboratory Manager at C&T Geotechnical South West with over 10 years of experience in construction materials testing. He has a strong background in compaction control, quality assurance testing, and project management for major road, rail, and civil construction projects.
Melbourne Office
47A Assembly Drive
Tullamarine, VIC 3043
South West Office
8 Freedman Street
North Geelong VIC 3215
Phone
(03) 7000 4648
