GSI offers comprehensive geotechnical services tailored to both engineering projects and standalone assessments. 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. Notably, GSI has conducted Alquist-Priolo Earthquake Fault zone studies for major faults throughout Southern California, allowing projects to be expertly designed to manage the impact of active and potentially active faults, thereby maximizing land use.

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.