Geotechnical engineering companies are in demand in California, which is characterized by a varied and challenging geological landscape. These companies offer services like soil and rock testing, slope stability analysis, and expert advice on construction projects to ensure building safely and efficiently. They work on a range of public and private projects, including transport infrastructure, urban development, renewable energy initiatives, and environmental rehabilitation. These firms often employ multidisciplinary teams of geologists, engineers, and scientists. As California continues to grapple with issues like climate change and rapid urbanization, these companies play a crucial role in ensuring future development is both resilient and sustainable.


Top 19 geotechnical engineering companies in California

1. Partner Engineering & Science, Inc.

  • Website: partneresi.com
  • Headquarters: Torrance, California, United States
  • Founded: 2007
  • Headcount: 501-1000
  • LinkedIn

Partner ESI is a full-service engineering, environmental, and energy consulting and design firm. They provide a range of services including geotechnical services, environmental assessments, construction inspections, and quality testing. Partner ESI is committed to understanding their clients' business needs and offers expertise in sustainable building, telecom sustainability, and renewable energy consulting.


2. Engeo

  • Website: engeo.com
  • Headquarters: San Ramon, California, United States
  • Founded: 1971
  • Headcount: 201-500
  • LinkedIn

ENGEO is a geotechnical engineering and environmental consulting company with offices in the United States, New Zealand, and Australia. They offer practical and efficient solutions for a broad range of projects, including urban development, transportation, public facilities, environmental assessments, and geologic evaluations.


3. Geocon

  • Website: geoconinc.com
  • Headquarters: San Diego, California, United States
  • Founded: 1971
  • Headcount: 201-500
  • LinkedIn

Geocon, Inc. is an environmental consulting firm specialized in geotechnical engineering, construction inspection, and instrumentation. They provide services for land development, transportation, infrastructure, institutional projects, and brownfield/redevelopment. With a focus on environmental stewardship, Geocon helps investigate and remediate sites contaminated with potential, suspected, or known pollutants. The company operates in various locations across California, including San Diego, Murrieta, Redlands, La Quinta, Burbank, Livermore, Fairfield, Rancho Cordova, and Irvine.


4. Condon-Johnson & Associates, Inc.

Condon-Johnson & Associates is an innovative geotechnical construction contractor that designs and builds complex foundation systems for commercial, heavy civil, and industrial projects throughout the Western United States.


5. Drill Tech Drilling and Shoring, Inc.

Drill Tech Drilling & Shoring, Inc. is a nationwide business specializing in earth retention, foundation support, mining, tunneling, shaft construction, ground treatment, dewatering, and architectural shotcrete.


6. Geo-Logic Associates, Inc.

  • Website: geo-logic.com
  • Headquarters: Ontario, California, United States
  • Founded: 1991
  • Headcount: 201-500
  • LinkedIn

Geo-Logic Associates (GLA) is an employee-owned, multidisciplinary environmental, civil, and geotechnical engineering consulting firm. With over 250 employees in 26 offices worldwide, GLA provides solutions for landfills, mines, contaminated sites, municipal projects, natural resources, and water resources.


7. RMA Group, Inc.

  • Website: rmacompanies.com
  • Headquarters: Rancho Cucamonga, California, United States
  • Founded: 1962
  • Headcount: 201-500
  • Latest funding type: Private Equity
  • LinkedIn

RMA Companies is a growing national provider of technology-enabled testing, inspection, and certification services. They support innovation in new product development, quality assurance for project delivery, and engineered solutions for asset management. They offer professional services in environmental consulting, geotechnical engineering, geophysics and subsurface imaging, pavement engineering, quality management, non-destructive testing, construction inspection, and product certification for critical infrastructure projects. RMA Companies is committed to the sustainable development of the communities they serve.


8. Group Delta Consultants, Inc.

Group Delta is a civil and geotechnical engineering company that offers a range of services including geotechnical engineering, environmental engineering, materials testing and inspection, and construction support. With over 30 years of experience, they have served clients in both the public and private sectors. Group Delta has offices in Irvine, Torrance, Anaheim, San Diego, and Ontario, as well as accredited laboratories in San Diego and Anaheim.


9. Blackburn Consulting

Blackburn Consulting is a geotechnical engineering firm that provides expert support and solutions for complex projects. With qualified staff and a commitment to quality and efficiency, they help clients achieve successful outcomes within tight budgets and time constraints.


10. Gregg Drilling, LLC

Gregg Drilling is a company that offers a wide range of drilling and testing solutions for environmental, geotechnical, and marine purposes. With a diverse range of equipment and capabilities, they provide innovative solutions and sound technical advice to tackle diverse soil conditions and terrain.


11. Earth Systems

Earth Systems is a geoprofessional services company that provides geotechnical engineering, geology, hydrogeology, and environmental construction materials testing and inspection services. They specialize in water and wastewater treatment, renewable energy, green building and sustainability, public works, military, commercial and industrial projects.


12. Construction Testing & Engineering, Inc.

  • Website: cte-inc.net
  • Headquarters: Escondido, California, United States
  • Founded: 1989
  • Headcount: 51-200
  • LinkedIn

CTE Inc. is a professional engineering company offering geotechnical engineering, construction materials testing & inspections, civil engineering design & survey, environmental services, and occupational health & safety. With over 33 years of experience, CTE provides expert solutions and superior services backed by national resources and a commitment to excellence.


13. Converse Consultants

Converse Consultants is an employee-owned corporation providing professional services in the fields of geotechnical engineering, engineering geology, groundwater sciences, environmental sciences, and material testing and inspection. With a focus on client satisfaction, well-trained staff, and openness to new technologies, Converse Consultants has been serving public agencies and private sector clients in various market segments since 1946.


14. Youngdahl Consulting Group, Inc.

  • Website: youngdahl.net
  • Headquarters: El Dorado Hills, California, United States
  • Founded: 1984
  • Headcount: 51-200
  • LinkedIn

Youngdahl Consulting Group, Inc. is a full-service geotechnical engineering, geoscience, environmental compliance, and construction observation and materials testing firm. They provide innovative engineering solutions to complex project problems.


15. Gmu

  • Website: gmugeo.com
  • Headquarters: Rancho Santa Margarita, California, United States
  • Founded: 1967
  • Headcount: 11-50
  • LinkedIn

GMU is a construction management and monitoring company that specializes in geotechnical engineering, pavement engineering, structural/civil engineering, and forensic engineering/expert witness services. With over 50 years of engineering excellence, GMU offers a wide range of services in the construction industry.


16. Gorian and Associates, Inc.

  • Website: gorian.net
  • Headquarters: Thousand Oaks, California, United States
  • Founded: 1973
  • Headcount: 11-50
  • LinkedIn

Gorian and Associates, Inc. is an established geotechnical firm based in Southern California. With over thirty-five years of experience, their team of professional geologists and geotechnical engineers provides consulting services in soil mechanics, foundation engineering, geology, engineering geology, and earthquake engineering. They also offer consultation, observation, and testing services during construction projects, focusing on practical solutions. Their expertise ranges from complex soil mechanics problems to field construction applications.


17. A3GEO, Inc.

  • Website: a3geo.com
  • Headquarters: Berkeley, California, United States
  • Founded: 2010
  • Headcount: 11-50
  • LinkedIn

A3GEO is a geotechnical, geologic and seismic consulting firm based in Berkeley, California. They offer their services locally as well as internationally, providing practical and technically-advanced solutions to client-driven issues relating to the earth.


18. Earth Mechanics, Inc. (EMI)

  • Website: earthmech.com
  • Headquarters: Fountain Valley, California, United States
  • Founded: 1989
  • Headcount: 11-50
  • LinkedIn

EMI is a geotechnical and earthquake engineering consulting firm specializing in transportation infrastructure. With over 29 years of experience, they have completed over 1,000 projects including bridges, freeways, roadways, tunnels, transit, rail, high-speed rail, wharves, and port facilities.


19. Murray Engineers, Inc.

Murray Engineers Inc. is a geotechnical consulting company providing services throughout the San Francisco Bay Area. They offer geotechnical engineering, engineering geology, construction observation, and real estate consultation. With an in-house laboratory, they specialize in slope protection and serve residential, commercial, and institutional clients.


Want to find more geotechnical engineering companies?


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