Who we are

GeoSoils, Inc. (GSI) is a premier geotechnical and environmental engineering consulting firm with a rich history of delivering innovative and cost-effective solutions to clients locally, nationally, and internationally. With offices in Los Angeles County, Orange County, the Inland Empire, and San Diego County, GSI is equipped with state-of-the-art facilities, including mobile laboratories for on-site needs.

Our team consists of multidisciplinary professionals, including geologists, civil and coastal engineers, hydrogeologists, and environmental technicians. Our specialties include geotechnical investigations, environmental engineering, coastal services, and litigation support, serving a wide range of sectors such as land development, public works, and private projects.

Construction site with a large crane lifting a concrete span for a bridge, workers below, and residential houses on a hillside in the background.

Learn About Our History

History
History

We partner with developers, contractors, civil engineers, homeowners and public agencies to provide reliable, practical solutions from early planning and entitlements through construction. Our integrated services include geotechnical investigations, environmental consulting, grading and foundation recommendations, trenching and shoring support, and construction observation and materials testing, all designed to help projects move forward efficiently and with confidence. Learn more about our services. 

With extensive experience across Southern California, GeoSoils understands the unique geologic and regulatory challenges of the region, including hillside development, expansive soils, liquefaction, groundwater conditions, and coastal environments. Our team delivers clear, actionable recommendations that reduce risk, support design, and keep projects on schedule.

Our multidisciplinary staff of geologists, engineers, and environmental professionals brings deep technical expertise and a collaborative, client-focused approach to every project. With strategically located offices and mobile laboratory capabilities, we provide responsive support across Los Angeles, Orange County, the Inland Empire, and San Diego.

As a women-led firm, GeoSoils is committed to delivering high-quality geotechnical and environmental engineering services while building strong, long-term partnerships within the development and construction industry.

Whether supporting a large residential community, public works project, or complex site development, GeoSoils provides the expertise and responsiveness clients rely on to move projects forward.

Our approach is simple, from earth to oceans, we’ve got you covered. We look forward to being your trusted partner for solutions rooted in integrity, defined by continuity, and proven through consistency.

Let us be your trusted engineering ally.

View Our Services
View Our Services
Detailed cross-section of archaeological excavation showing stratified soil layers with red markings and exposed sediment layers in an outdoor archaeological site.
Two construction workers wearing safety helmets and jackets operate a drilling machine on a construction site during daytime with palm trees and buildings in the background.
Close-up of a rock face with mineral deposits and a measuring stick for scale. geologic. soils testing
Drill Rig on a coastal bluff performing micropile installation during upper-bluff stabilization
An excavator digging a trench in a dry, grassy landscape with rolling hills in the background.
A Mud Drill bit standing upright
A construction worker in a wide-brimmed hat stands near a large, partially buried metal pipe at a construction site. The pipe is large, arched, and appears to be part of a tunnel or sewer system under construction. There is a pile of dirt and cinder
Close-up of a sandy area with a trench or excavation, with blue spray paint markings on the dirt and a small pink plastic tool or object on the right side.
A construction worker in a white long-sleeve shirt, white wide-brim hat, and gloves working in a hole on a dirt road, with a headlamp on helmet, next to a large truck with a metal framework
Geosoils Engineer observing and filling out a report describing the conditions of the drilling operations
Construction workers on a new bridge in a hilly, semi-arid landscape with patches of greenery, under cloudy skies.
Construction site on hilly terrain with a partially built bridge, construction vehicles, and pipes, set against a backdrop of mountains and a partly cloudy sky.
A scraper working on a steep dirt hill under a clear blue sky, with two distant pieces of mining or construction equipment.
Oil drilling rig operating in a grassy field with mountains in the background