Public engineering firm directory

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AESCO, Inc.

Huntington Beach, CA

Building America from the ground up since 1993

WebsitePhone1 office3 projectsFounded 1993Updated Jun 2026

Project: I-405 Improvement Project

Service: Geotechnical EngineeringService: Geotechnical drilling and field explorationService: Soils evaluationIndustry: CommercialIndustry: GovernmentType: Geotechnical Engineering+25 more

AGS, Inc.

San Francisco, CA

Enhancing communities and the built environment.

WebsitePhone2 offices6 projects10 leaders7 credentialsFounded 1983

Project: SFO Harvey Milk Terminal Boarding Area B

Service: Geotechnical EngineeringService: Site Characterization & Engineering GeologyService: Seismic Design & AnalysisIndustry: AirportsIndustry: Water SupplyType: Geotechnical Engineering+40 more

Abi Engineering Consultants Inc

Santa Ana, CA

Geotechnical, Civil, and Structural Engineering Across California and the Western States

WebsitePhone1 office10 projects2 leadersFounded 2004Updated Jun 2026

Project: LA Metro Gold Line - MSE Wall

Service: Geotechnical EngineeringService: Site Investigation and Subsurface ExplorationService: Foundation Design and Lateral Earth Pressure AnalysisIndustry: CommercialIndustry: IndustrialType: Civil Engineering+39 more

Barnett Quality Control Services Inc

San Diego, CA

Our Services. Your Success.

WebsitePhone2 offices9 projects11 leaders9 credentialsFounded 2008

Project: Directors Place

Service: Environmental ServicesService: Phase I Environmental Site AssessmentService: Phase II Environmental Site AssessmentIndustry: CommercialIndustry: EducationType: Geotechnical Engineering+94 more

Base Geotech Inc.

Los Angeles, CA

Geotechnical, Geological and Environmental Consultants

WebsitePhone1 office2 leadersUpdated Jun 2026

Service detail: Geotechnical and Construction Materials Testing

Service: Geotechnical and Construction Materials TestingService: Site EvaluationService: Subsurface ExplorationIndustry: Environmental & RemediationIndustry: Waste ManagementType: Civil Engineering+33 more

Blackburn Consulting

Auburn, CA

Our signature is excellence

WebsitePhone5 offices8 leaders4 credentialsFounded 1998Updated Jun 2026

Service detail: Geotechnical Design

Service: Geotechnical DesignService: Subsurface InvestigationsService: Geotechnical AnalysisIndustry: InfrastructureIndustry: TransportationType: Geotechnical Engineering+23 more

Byer Geotechnical Inc.

Glendale, CA

Integrity Is Our Foundation

WebsitePhone1 office8 projects4 leadersSize Estimate: 18 employeesUpdated Jun 2026

Project: One Santa Fe

Service: Geologic & Soils EngineeringService: Single Family Residential ConstructionService: Residential Hillside SubdivisionsIndustry: ResidentialIndustry: Multifamily ResidentialType: Geotechnical Engineering+37 more

Collier Consulting, Inc.

Stephenville, TX

We Bring a World of Solutions

WebsitePhone11 offices18 leadersFounded 1998Size Estimate: 25-50 employeesUpdated Jun 2026

Service detail: Geoscience

Service: GeoscienceService: GroundwaterService: EnvironmentalIndustry: Water ResourcesIndustry: Water SupplyType: Environmental Engineering+30 more

Edifica USA

Lake Forest, CA

Multi-discipline geotechnical, structural, and environmental engineering services

WebsitePhone2 offices1 projectsUpdated Jun 2026

Project: SPLA Port

Service: Geotechnical EngineeringService: Geotechnical Design and AnalysisService: Subsurface Exploration for InfrastructureIndustry: Ports & HarborsIndustry: Highways & RoadsType: Geotechnical Engineering+40 more

GMU Geotechnical, Inc.

Rancho Santa Margarita, CA

Over 50 Years of Engineering Excellence

WebsitePhone1 office9 projects5 credentialsUpdated Jun 2026

Project: Boulder Pond Park

Service: Geotechnical EngineeringService: Site ExplorationService: Slope Stability and Landslide AnalysisIndustry: CommercialIndustry: RetailType: Civil Engineering+41 more

Geo-Advantec, Inc.

San Dimas, CA

Leading Geotechnical Consulting Firm

WebsitePhone1 office3 projects5 leaders7 credentialsFounded 2012

Project: City of Commerce Washington Boulevard Rehabilitation Project

Service: Geotechnical EngineeringService: Geotechnical Field ExplorationsService: Foundation Analysis & DesignIndustry: TransportationIndustry: GovernmentType: Geotechnical Engineering+30 more

GeoConcepts, Inc.

Van Nuys, CA

Over 25 years of experience!

WebsitePhone1 office2 leaders3 credentialsFounded 1995Updated Jun 2026

Service detail: Site Exploration

Service: Site ExplorationService: Engineering Geologic ReportsService: Geotechnical Engineering ReportsIndustry: ResidentialIndustry: CommercialType: Geotechnical Engineering+24 more

GeoMat Testing Laboratories, Inc.

Riverside, CA

GeoMat Testing Laboratories, Inc. offers comprehensive consulting services in geotechnical engineering, geology, environmental engineering, and construction services and materials testing. Its services are applied in the planning, design, and construction of municipal, public works, commercial, and industrial projects throughout California. The staff includes scientists and engineers with technical disciplines in geotechnical engineering, soil mechanics, earthwork engineering, rock mechanics, engineering geology, environmental engineering, pavement studies, materials testing, and construction inspection.

WebsitePhone2 officesUpdated Jun 2026

Service detail: Geotechnical Engineering

Service: Geotechnical EngineeringService: Geotechnical InvestigationsService: Foundation Investigation and DesignIndustry: CommercialIndustry: EducationType: Civil Engineering+28 more

GeoTek, Inc.

Las Vegas, NV

Engineering Excellence

WebsitePhone6 offices3 projects1 credentialsFounded 1997Size Estimate: 200+ employees

Project: Rhodes Ranch Residential Development

Service: Geotechnical EngineeringService: Geotechnical Drilling and Subsurface ExplorationsService: Geotechnical Evaluation ReportsIndustry: CommercialIndustry: ResidentialType: Geotechnical Engineering+44 more

Geocon, Inc.

San Diego, CA

Practical Solutions to Support You From Ground to Structure.

WebsitePhone11 offices9 projects2 leaders6 credentialsFounded 1971

Project: Soboba Replacement Casino

Service: Geotechnical EngineeringService: Geotechnical InvestigationsService: Foundation Design & AnalysisIndustry: Land DevelopmentIndustry: TransportationType: Geotechnical Engineering+20 more

Geolabs, Inc.

Waipahu, HI

Geolabs, Inc. is a full-service geotechnical engineering practice established in 1975 and headquartered in Waipahu, Oahu. With 80 staff and offices across Hawaii and in Oakland, California, Geolabs delivers foundation investigations, roadway embankment design, dam and reservoir engineering, and landslide and rockfall mitigation throughout Hawaii and the Pacific Basin. It brings nearly five decades of accumulated soil and geologic data across the region to every investigation.

WebsitePhone4 offices6 projects17 credentialsFounded 1975Size Estimate: 50-199 employees

Project: International Marketplace

Service: Geotechnical DesignService: Subsurface ExplorationService: Foundation EngineeringIndustry: InfrastructureIndustry: TransportationType: Geotechnical Engineering+11 more

Geolotech, Inc.

Los Angeles, CA

Geolotech, Inc. is a geotechnical consulting firm based in Los Angeles, California. It provides engineering geology and soils engineering services to clients throughout Los Angeles County and adjacent areas. Professional services cover residential and commercial projects including single- and multi-family residences, apartment buildings, residential tracts, industrial developments, and additions to existing structures. The team of licensed geologists and engineers delivers subsurface investigations, geotechnical and geologic reports, foundation recommendations, liquefaction analysis, infiltration testing, and construction inspection services.

WebsitePhone1 office2 leadersUpdated Jun 2026

Service detail: Geological Services

Service: Geological ServicesService: Engineering Geologic ReportsService: Geotechnical ServicesIndustry: ResidentialIndustry: CommercialType: Geotechnical Engineering+9 more

Geotechnical Solutions, Inc.

Irvine, CA

Geotechnical Solutions, Inc. (GSI) is a full-service geotechnical engineering and testing consulting firm based in Irvine, California, incorporated in 1993. GSI serves residential, commercial, industrial, wireless, institutional, religious, and public works clients throughout Southern California, with extended service areas in Central California, Nevada, and Southwestern Arizona. GSI operates a certified in-house laboratory and applies state-of-the-art software for seismic evaluation, slope stability, foundation analysis, pile analysis, and liquefaction studies. GSI has completed over 8,000 projects since 1992, including more than 6,000 wireless telecommunications sites, and serves as the sole geotechnical consultant for the Diocese of Orange.

WebsitePhone1 office1 leaders2 credentialsFounded 1993Updated Jun 2026

Service detail: Geotechnical Engineering

Service: Geotechnical EngineeringService: Subsurface explorationsService: Cone penetrometer testingIndustry: TelecommunicationsIndustry: EducationType: Geotechnical Engineering+37 more

Helenschmidt Geotechnical, Inc.

Carlsbad, CA

Consulting Engineers & Geologists

WebsitePhone1 office10 projects1 leaders9 credentialsFounded 2004

Project: Soledad Mountain Road Landslide

Service: Geotechnical InvestigationsService: Subsurface Exploration & SamplingService: Cone Penetrometer (CPT) SoundingsIndustry: ResidentialIndustry: CommercialType: Geotechnical Engineering+22 more

LOR Geotechnical Group, Inc.

Riverside, CA

Innovative. Communicative. Results Driven.

WebsitePhone1 office2 leaders6 credentialsFounded 1988Updated Jun 2026

Service detail: Soil Engineering

Service: Soil EngineeringService: Preliminary Geotechnical InvestigationsService: Geotechnical Feasibility StudiesIndustry: CommercialIndustry: ResidentialType: Geotechnical Engineering+26 more

Landmark Consultants Inc

El Centro, CA

Landmark Consultants, Inc. offers a broad range of geotechnical engineering, construction materials testing, and environmental consulting services in Southern California. Serving both public and private sectors, the practice provides technical evaluations from initial site planning through construction. Key services include geotechnical investigations, soil and concrete testing, special inspections, and environmental site assessments.

WebsitePhone2 offices3 leadersFounded 2003Size Estimate: 21 employeesUpdated Jun 2026

Service detail: Geotechnical Engineering

Service: Geotechnical EngineeringService: Geotechnical InvestigationsService: Geologic and Engineering ReportsIndustry: GovernmentIndustry: Water SupplyType: Environmental Engineering+19 more

Materials Testing, Inc. dba KC Engineering Co.

Vacaville, CA

Engineering Consulting and Testing Firm

WebsitePhone2 offices2 projects3 leaders5 credentialsFounded 1996

Project: The Cypress Avenue Bridge Replacement Project

Service: Geotechnical EngineeringService: Subsurface ExplorationService: Geotechnical Design CriteriaIndustry: TransportationIndustry: Highways & RoadsType: Geotechnical Engineering+36 more

PJC & Associates, Inc.

Rohnert Park, CA

Consulting Engineers & Geologists Northern California

WebsitePhone1 office5 credentialsFounded 1990Updated Jun 2026

Service detail: Geotechnical Engineering

Service: Geotechnical EngineeringService: Design Level Geotechnical InvestigationsService: Geotechnical Consultations During ConstructionIndustry: ResidentialIndustry: Multifamily ResidentialType: Geotechnical Engineering+57 more

Reese and Associates, Inc.

Santa Rosa, CA

Reese and Associates, Inc. is a geotechnical engineering firm headquartered in Santa Rosa, California, providing consulting and laboratory testing services to residential and commercial clients in the North Bay area. Formed in 2009 from the operations of Giblin Associates, Consulting Geotechnical Engineers, Reese and Associates serves public and private sector clients with geotechnical investigations, subsurface explorations, fault studies, geologic hazard assessments, and in-house laboratory testing performed to ASTM and Caltrans standards. During construction, geotechnical engineers and field technicians provide observation and testing services for site grading, fill placement, and foundation construction.

WebsitePhone1 office4 leaders3 credentialsFounded 2009Updated Jun 2026

Service detail: Geotechnical Engineering

Service: Geotechnical EngineeringService: Geotechnical and Geologic ReconnaissanceService: Site InvestigationIndustry: ResidentialIndustry: CommercialType: Geotechnical Engineering+21 more