Herzog Geotechnical

What Herzog Geotechnical does

Herzog Geotechnical is a privately held geotechnical engineering consulting firm headquartered at 70 Woodside Lane, Mill Valley, California, founded by Craig Herzog to continue the professional standards of the Herzog family's geotechnical practice spanning approximately 50 years. The firm provides an integrated suite of geotechnical services including subsurface characterization (drilling, CPT, test pits, seismic refraction), laboratory testing, foundation engineering, lateral support systems design, geologic hazards evaluations, earthquake site response analysis, slope stability analyses, construction observation, and expert witness services for litigation and alternative dispute resolution. Personnel include professionals with B.S., M.S., and Ph.D. degrees, and the firm is registered to operate as a professional engineering practice in California.

The firm serves government agencies (state, county, municipal, and water districts), educational institutions, private developers, and law firms primarily throughout the San Francisco Bay Area including Marin County, Napa Valley, Sonoma County, and San Jose. Representative projects include landslide repair and roadway stabilization for California State Parks, peer review work for the City of Novato, water tank and pipeline projects for Marin Municipal Water District, geotechnical investigations for Napa Valley College and Santa Rosa Junior College, deep-seated landslide evaluation for the City of San Jose, and forensic expert witness engagements with approximately 25 Bay Area law firms. The firm's competitive positioning rests on California-specific expertise in seismic site response, liquefaction evaluation, Bay Mud and Franciscan Melange characterization, and deep-seated landslide analysis.

Herzog Geotechnical operates on a project-based professional services billing model with no publicly disclosed pricing tiers. Revenue is generated through consulting fees tied to investigation scope, design recommendations, construction observation, and expert witness testimony. The firm has no parent company, no subsidiaries, no disclosed funding rounds, and no publicly disclosed revenue or headcount figures. Marketing is limited to a basic company website with direct contact information; no digital advertising, content marketing, or social media presence was identified beyond the website.

Name

Herzog Geotechnical

Legal name

Herzog Geotechnical

Website

https://herzog-geotechnical.com

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

Herzog Geotechnical is a privately held geotechnical engineering consulting firm in Mill Valley, California, serving Bay Area government agencies, educational institutions, private developers, and law firms with subsurface investigation, foundation engineering, seismic and slope stability analysis, and expert witness services.

Ownership category

akta.pro rank

Product category

Geotechnical Engineering Services

NAICS

Engineering Services (541330), Architectural, Engineering, and Related Services (5413), Geophysical Surveying and Mapping Services (54136)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Geotechnical Design, Engineering & Consulting (Analysis, Design, Peer Review) (IMAFAOAK)

akta.pro secondary industries

Geotechnical & Subsurface Engineering Consulting (BPAHAIAB), Geotechnical Site Investigation & Engineering Geology (Borings, Lab Testing) (EUAHAFAE), Geotechnical Instrumentation & Monitoring (Settlement, Inclinometers, Piezometers) (IMAFAOAH)

Keywords

• Geotechnical engineering
• Foundation engineering
• Slope stability analysis
• Seismic site response
• Expert witness services

Headquarters

HQ city

Mill Valley

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D

Revenue model

1. Geotechnical Engineering Consulting Services: Professional consulting services including geotechnical investigation, design recommendations, construction observation, and expert witness services billed on a project basis.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

Herzog Geotechnical is a geotechnical engineering consulting firm that provides subsurface characterization, laboratory testing, foundation engineering, lateral support system design, geologic hazards evaluation, earthquake site response, slope stability analysis, expert witness testimony, and construction observation and testing. The firm serves government agencies, municipalities, educational institutions, private developers, and legal professionals primarily across the San Francisco Bay Area, including Marin County, Napa, Sonoma, and San Jose.

Product overview

Herzog Geotechnical is a geotechnical engineering consulting firm offering a comprehensive suite of services including Subsurface Characterization, Laboratory Testing, Foundation Engineering, Lateral Support Systems, Geologic Hazards Evaluations, Earthquake Site Response, Slope Stability Analyses, Expert Witness Services, and Construction Observation and Testing. The firm provides these integrated services to address residential, commercial, and expert witness needs, combining rigorous analysis with innovative solutions for unique project challenges.

Differentiator

Problem solved

Functional benefit

Products and services

• Subsurface Characterization Characterization of subsurface conditions using auger, air-rotary and rotary wash drilling and sampling, Cone Penetration Testing (CPT), test pit excavation and sampling, and seismic refraction surveys, performed for residential, commercial, and public infrastructure projects.
• Laboratory Testing Classification, strength, and specialty geotechnical laboratory testing services with all results reviewed by a registered professional engineer.
• Foundation Engineering Development of suitable alternatives for shallow or deep foundation support, including recommended bearing and passive pressures, skin friction, minimum embedment depths, and calculated elastic and consolidation settlements.
• Lateral Support Systems Evaluation and design of temporary or permanent lateral support for cut or fill slopes, including conventional retaining walls, cantilevered or tiedback sheetpiles, soil nailing, post-tensioned tiebacks or rock anchors, segmental reinforced earth walls, and tiedback mesh systems.
• Geologic Hazards Evaluations Evaluation of potential geologic hazards including fault rupture, ground shaking, liquefaction, densification, landsliding, and tsunami or seiche inundation in accordance with California Geological Survey guidelines.
• Earthquake Site Response Development of seismic design parameters for structural design, liquefaction evaluation, or slope stability analyses using deterministic and probabilistic methods and site-specific response spectra calculations.
• Slope Stability Analyses Static and seismic slope stability analyses for cut and fill slopes, earth dams, refuse and liner systems, and levees using two- and three-dimensional methods, with seismically induced slope deformation calculations.
• Expert Witness Services Forensic and expert witness services provided by professionals with B.S., M.S., and Ph.D. degrees during litigation and alternative dispute resolution proceedings, with an established client roster of more than 27 law firms.
• Construction Observation and Testing Observation and testing services during earthwork grading, utility trenching, foundation excavation, pier drilling, pile driving, tieback installation and testing, subgrade preparation and paving, and installation of subsurface drainage.

Quantifiable outcome

• Evaluated deep-seated landslides exceeding 300 feet in depth
• +2 more outcomes

Named customers11 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators2 records

Recent moves4 records

Expansion highlights2 records

Broad incumbents

• Haley & Aldrich: National geotechnical and environmental engineering consultancy offering site investigation, foundation design, and seismic services. Comparable offering to Herzog at larger scale with broader geographic reach.
• Kleinfelder: Large national engineering firm with deep geotechnical practice including site investigation, foundation design, seismic and slope stability services. Direct competitor for Bay Area municipal and private geotechnical work, but operates at much greater scale and scope than Herzog.
• Langan Engineering & Environmental Services: Engineering firm with strong geotechnical practice serving real estate, infrastructure, and energy clients. Comparable in service offering and technical depth, broader geography and larger bench than Herzog.
• Terracon Consultants: Large national engineering and consulting firm providing geotechnical, environmental, and construction materials testing services. Overlapping service portfolio with Herzog, particularly in subsurface characterization, foundation engineering, and construction observation.

Direct peers

• Earth Systems Consultants: California-based geotechnical and geosciences consulting firm providing site investigation, foundation engineering, seismic and geologic hazard evaluations. Closely comparable specialty regional competitor in the same California market.
• Cornerstone Earth Group: California-based geotechnical and environmental consulting firm specializing in foundation engineering, seismic evaluation, and slope stability. Closely comparable specialty competitor focusing on similar Bay Area and Northern California clients.
• Shannon & Wilson: Geotechnical and environmental consulting firm specializing in site investigation, foundation engineering, seismic and slope stability work. Closely comparable specialty consulting model and service mix to Herzog, with strong West Coast presence.
• Taber Consultants: Bay Area geotechnical engineering firm providing site investigation, foundation design, and construction observation services. Closely comparable specialty regional peer competing for the same municipal and private clients.

Regional players

• Leighton Group (Leighton and Associates): Southern California geotechnical engineering consultancy with expertise in seismic, landslide, and foundation work. Comparable capability set to Herzog but primarily serves the LA/Southern California market.
• RGH Consultants: California geotechnical engineering firm providing site investigation, foundation design, and construction observation to public and private clients. Comparable regional competitor in Northern California.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/herzog-geotechnical

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Herzog Geotechnical