Our Vision
To become a trusted and respected engineering geology and geotechnical services provider in South Africa, recognised for technical excellence, reliable service and practical ground engineering solutions.
Ground insight. A stronger tomorrow.
Understanding the ground.
Understanding the ground.
Building with confidence.
Practical, reliable and technically sound engineering geology and geotechnical services for construction, infrastructure, housing and development projects.
Professional service
Accurate results
Practical solutions
CSG
People • Projects • Communities
Professional ServiceReliable support from start to finish
Accurate ResultsClear, dependable technical information
Experienced TeamEngineering geology and field expertise
Sustainable SolutionsSite-aware, practical recommendations
About Cornerstone
Ground investigation that supports better decisions.
Cornerstone Geosolutions is an engineering geology and geotechnical services company providing practical, reliable and technically sound ground investigation solutions for construction, infrastructure, housing and development projects.
Our work focuses on understanding ground conditions and providing the technical information clients need to make informed decisions about foundations, earthworks, construction and overall site development.
Our Mission
To provide high-quality geotechnical and engineering geological services that help clients understand ground conditions, manage geotechnical risks and develop safe, economical and suitable construction solutions.
Technical leadership
Engineering geology expertise supported by field investigation and geotechnical reporting experience.
Our Services
Geotechnical & engineering geological support.
Investigation methods and testing requirements are selected according to project objectives, site conditions and client requirements.
01
Geotechnical Site Investigations
- Desktop geological and geotechnical assessments
- Site reconnaissance and walkovers
- Trial pits / test pitting
- DCP and DPSH testing
- Borehole investigations
- Soil and rock sampling
- Engineering geological profiling
- Foundation assessments and recommendations
02
NHBRC & Housing Developments
- NHBRC-related geotechnical investigations
- Residential stand investigations
- Phase 1 and Phase 2 investigations
- Foundation condition assessments
- Test pitting and DCP testing
- Soil sampling and laboratory coordination
- Geotechnical reporting
- Foundation recommendations
03
Field Investigation & Testing
- Test pitting and soil profiling
- DCP and DPSH testing
- Borehole investigations
- Core logging
- Soil and rock sampling
- In-situ testing
- Ground condition assessments
- Foundation investigations
04
Laboratory Testing Support
- Foundation Indicator testing
- Particle size distribution
- Atterberg Limits
- California Bearing Ratio (CBR)
- Material classification
- Moisture content
- Corrosivity testing
- Project-specific geotechnical tests
05
Geotechnical Reporting
- Geological setting and methodology
- Field and laboratory results
- Soil and rock profiles
- Geotechnical interpretation
- Foundation and site classification guidance
- Excavation and earthworks considerations
- Drainage and groundwater observations
- Risk, conclusions and recommendations
Built for practical outcomes
From the ground up to a stronger project.
We combine field observations, testing and interpretation to turn ground conditions into clear technical recommendations for planning and construction.
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Sectors We Serve
Supporting developments across South Africa.
Residential Developments
Housing Projects
Commercial Developments
Industrial Developments
Civil Infrastructure
Roads & Transport
Property Developers
Construction Companies
Engineering Consultancies
Mining & Quarrying
Private Landowners
Municipal & Public Sector
Why Cornerstone Geosolutions
Clear information. Practical recommendations. Professional delivery.
Our approach combines technical experience, responsible fieldwork and clear communication to help clients move forward with confidence.
Practical engineering geology and geotechnical investigation experience supported by academic training and fieldwork.
Ground investigation data translated into useful recommendations for project planning and construction.
Clear communication from initial site assessment through fieldwork, laboratory testing and reporting.
High standards of fieldwork, documentation, data collection and technical reporting.
Our Approach
A structured process from project brief to final report.
Project Brief
Establish project requirements, site information and objectives.
Desktop Assessment
Review available geological, geographical and project information.
Field Investigation
Undertake appropriate test pits, DCP/DPSH testing, boreholes, sampling and profiling.
Laboratory Testing
Submit representative samples for relevant testing where required.
Data Interpretation
Assess field observations and laboratory results to identify geotechnical characteristics and risks.
Reporting
Prepare a technical report with findings, conclusions and practical recommendations.
Quality & Safety
Professional, responsible and technically sound fieldwork.
Cornerstone Geosolutions places emphasis on safe fieldwork practices, proper investigation procedures, accurate field records, representative sampling, reliable data collection, appropriate laboratory testing and clear technical reporting.
IntegrityHonesty, transparency and accountability.
ProfessionalismProfessional fieldwork, communication and technical deliverables.
QualityReliable and technically sound services.
ReliabilityMeeting project timelines and keeping clients informed.
ExcellenceContinuous improvement of technical knowledge, services and project delivery.
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Need reliable ground investigation support?
Tell us about your site, development or infrastructure project. We can help identify an appropriate investigation approach and provide the technical information needed for informed engineering decisions.