Engineering Geology

GSI offers comprehensive geotechnical services tailored to both engineering projects and standalone assessments. GeoSoils, Inc. provides comprehensive geotechnical engineering services to support safe, efficient, and cost-effective land development and infrastructure projects. Our experienced geotechnical engineers evaluate subsurface soil and groundwater conditions to provide design recommendations that support structural stability, regulatory compliance, and long-term project performance.


We work with developers, architects, contractors, municipalities, and engineering firms to assess site conditions and provide practical engineering solutions for projects ranging from residential developments to complex commercial and infrastructure projects.

Our expertise spans a wide array of areas, including evaluations of geologic hazards such as landslides, fissuring, faulting, excavation characteristics of rock units, hydrogeology, and subsurface conditions like soil creep and subsidence.

Our project scope ranges from simple field reconnaissance to more intricate geologic evaluations that leverage advanced techniques such as stereoscopic aerial photograph review, seismic refraction surveys, and detailed mapping.

Additionally, GSI excels in preparing practical seismic and safety evaluations across California. Our methodology involves extensive data collection, analysis, and transcription for hazard abatement, forming the foundation for developing effective policies and programs in collaboration with planning divisions and government agencies.

GSI also provides specialized geologic and forensic services for private clients and government entities. Our offerings include litigation support, expert witness testimony, third-party reviews, and cost estimation for attorneys representing a diverse clientele, including developers, contractors, homeowners' associations, and individual property owners. Trust GSI to deliver precise, reliable geotechnical solutions for your project needs.

Services Include:

  • Geologic hazard assessments (landsliding, faulting, subsidence).

  • Hydrogeological studies and soil creep evaluations.

  • Remote sensing and seismic surveys for detailed mapping.

  • Forensic geology and litigation support.