Youngdahl Consulting Group

What Youngdahl Consulting Group does

Youngdahl Consulting Group, Inc. is a privately held, family-owned professional services firm headquartered in El Dorado Hills, California, founded in 1984. The firm delivers geotechnical engineering, geoscience, environmental compliance, earthwork construction observation, construction materials testing and special inspection, laboratory testing, and stormwater compliance services to public and private clients across Northern and Central California. Its core technical platform is a full-stack engineering and field-testing operation that includes a nationally accredited on-site construction testing laboratory, registered engineers and geologists (civil, geotechnical, engineering geology, hydrogeology, environmental assessment), and certified field staff holding ICC, DSA, AWS, and Qualified SWPPP Developer/Practitioner credentials. The firm is also a state-certified Trainer of Record for both the Construction General Permit (CGP) and Industrial General Permit (IGP) in California.

The company makes money through project-based professional services engagements priced by scope of work, with no publicly disclosed pricing. Its revenue streams fall into three categories tied to the construction lifecycle: (1) pre-construction consulting — geotechnical investigations, geologic hazard reports, feasibility studies, and environmental site assessments; (2) construction-phase services — earthwork observation, lime treatment, materials testing, and special inspection; and (3) compliance and training — stormwater permitting (QSD/QSP/QISP) and certified CGP/IGP training. Go-to-market is enterprise/field-sales driven, anchored by direct client engagement, RFP and public-works bid responses, and long-term relationships with municipal, state, and federal clients, supported by a corporate website, LinkedIn, and Facebook presence as top-of-funnel channels.

Customer concentration is diversified across eight vertical segments — Civic & Government, Education, Health Care, Residential, Commercial, Infrastructure, Environmental, and Parks & Recreation — with named anchor relationships spanning multiple decades, including Beale Air Force Base (since 1994), Barton Memorial Hospital (41 projects since 2004), Whole Foods Market stores (since 2007), California ISO, SMUD, Beale AFB, and various municipalities. Total headcount sits in the 101-250 band, with operations delivered from the El Dorado Hills headquarters and a Rocklin field office. The firm emphasizes a family-oriented culture with reportedly low employee turnover as a differentiator. No ownership changes, external investment, M&A, or leadership transitions are referenced in available source material.

Name

Youngdahl Consulting Group

Legal name

Youngdahl Consulting Group, Inc.

Website

https://youngdahl.net

Company type

Private

Founded year

1984

Operating status

Operating

Headcount range

101–250 employees

Short description

Youngdahl Consulting Group is a family-owned, Northern California geotechnical engineering, environmental compliance, and construction materials testing firm founded in 1984, serving government, education, healthcare, commercial, residential, and infrastructure clients across the region.

Ownership category

akta.pro rank

Product category

Geotechnical Engineering Services

NAICS

Architectural, Engineering, and Related Services (5413), Engineering Services (541330), Testing Laboratories and Services (54138), Testing Laboratories and Services (541380), Environmental Consulting Services (54162), Environmental Consulting Services (541620)

SIC

Services-Engineering Services (8711), Services-Testing Laboratories (8734), Construction - Special Trade Contractors (1700)

akta.pro primary industry

Geotechnical & Subsurface Engineering Consulting (BPAHAIAB)

akta.pro secondary industries

Construction Engineering & Constructability Consulting (BPAHAIAN), Water, Wastewater & Stormwater Compliance (BPAHAJAJ), EHS Management Systems & ISO Consulting (ISO 14001/45001) (BPAHAJAF), Geotechnical Site Investigation & Engineering Geology (Borings, Lab Testing) (EUAHAFAE), Inspection, Integrity & Testing Services (NDT, Well Integrity, Corrosion, QA/QC) (EUALABAO)

Keywords

• Geotechnical engineering services
• Construction materials testing
• Environmental compliance consulting
• Geoscience consulting
• Stormwater compliance services

Headquarters

HQ city

El Dorado Hills

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Geotechnical Engineering Services: Professional consulting services including geotechnical investigations, geologic hazard reports, and engineering studies for construction projects ranging from residential to commercial and infrastructure developments.
2. Materials Testing & Special Inspection: Construction materials testing and special inspection services (concrete, masonry, structural steel) delivered during construction phases with ICC and AWS certified technicians.
3. Environmental & Geoscience Services: Environmental compliance assessments, stormwater compliance services, and geoscience consultations from conceptual planning through project completion.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Youngdahl Consulting Group, Inc. is a full-service geotechnical engineering, geoscience, environmental compliance, and construction observation and materials testing firm. It delivers site investigations, geologic hazard assessments, special inspection, laboratory testing, earthwork construction oversight, and stormwater compliance services to public and private clients across Northern and Central California, supported by a nationally accredited on-site construction testing laboratory.

Product overview

Youngdahl Consulting Group offers a comprehensive suite of geotechnical engineering and construction testing services organized as seven core service offerings: Geotechnical Engineering, Geoscience, Environmental, Earthwork Construction, Materials Testing & Special Inspection, Laboratory Testing, and Stormwater Compliance. These services work together to provide complete project support from conceptual planning through construction completion, serving clients across Northern and Central California in sectors including civic/government, education, healthcare, residential, infrastructure, parks & recreation, commercial, and environmental projects. The company operates a nationally accredited construction testing laboratory on-site and employs registered engineers, geologists, certified technicians, and Qualified SWPPP Developers and Practitioners.

Differentiator

Problem solved

Functional benefit

Products and services

• Geotechnical Engineering Provides geotechnical engineering studies, site investigations, consultation, and analysis for construction projects including foundations, slopes, and earth structures, serving public, commercial, and residential clients in Northern and Central California.
• Geoscience Offers geologic hazard assessments, slope evaluations, and geoscience consulting for construction and development projects, supporting risk identification and mitigation for public and private developments.
• Environmental Provides environmental compliance services, Phase I Environmental Site Assessments (ESA), naturally occurring asbestos (NOA) assessments, and environmental consulting for construction and development projects.
• Earthwork Construction Offers earthwork construction services including grading observation, excavation support, lime treatment, and construction observation and consultation for site development projects.
• Materials Testing & Special Inspection Provides construction materials testing and special inspection services for concrete, masonry, structural steel, and bolting per ICC and AWS standards, delivered during construction by certified technicians.
• Laboratory Testing Offers a nationally accredited construction testing laboratory providing soils testing, concrete testing, compaction curves, and other material analysis services to support internal projects and external clients.
• Stormwater Compliance Provides stormwater compliance services including Qualified SWPPP Developer (QSD) and Practitioner (QSP, QISP) services, and state-certified training for California's Construction General Permit and Industrial General Permit.

Quantifiable outcome

• 11,000+ projects completed since 1984
• +2 more outcomes

Named customers12 records

Segments8 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators5 records

Recent moves4 records

Expansion highlights4 records

Broad incumbents

• Tetra Tech: Global consulting and engineering firm providing water, environmental, and infrastructure services, including geotechnical and construction management capabilities. A larger, publicly-traded incumbent operating broadly in overlapping verticals.
• AECOM: Global infrastructure consulting firm with environmental, geotechnical, and construction services capabilities across California public works and infrastructure projects. Larger, full-service incumbent competing for larger project scopes.
• NV5 Global: Public infrastructure, environmental, and geospatial services firm with significant California presence offering geotechnical and materials testing as part of broader portfolio. Larger, diversified competitor with overlapping but wider service set.

Direct peers

• Shannon & Wilson: Geotechnical and environmental consulting firm providing subsurface investigations, geologic hazard studies, and construction observation services. Comparable service offering and customer base in public infrastructure and development.
• Kleinfelder: National engineering firm providing geotechnical, environmental, and construction materials testing services with overlapping service lines across municipal, commercial, and infrastructure clients. Highly comparable in scope and delivery model, though larger and geographically broader.
• Terracon Consultants: Major U.S. geotechnical, environmental, construction materials, and facilities engineering consulting firm. Directly comparable services (geotechnical, materials testing, special inspection, environmental) and similar client mix of public agencies and private developers.
• GeoEngineers: Geotechnical and environmental consulting firm offering site investigations, materials testing, and geoscience services. Comparable professional services model with overlap in infrastructure, water, and development markets.

Regional players

• Wallace-Kuhl & Associates: Northern California geotechnical and environmental engineering firm providing site investigations, construction materials testing, and special inspection. Direct regional overlap with Youngdahl in NorCal markets.
• Twining, Inc. California-focused engineering consulting firm offering geotechnical engineering, materials testing, and special inspection services. Regional peer with comparable service lines and overlapping client base across Northern California.
• Earth Systems Inc. California-based geotechnical, environmental, and materials testing firm serving Northern and Central California. Direct regional overlap with Youngdahl in geography, service mix, and target clients (municipalities, developers, schools).

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/YoungdahlConsulting
• LinkedInlinkedin.com/company/youngdahl-consulting-group-inc.

Revenue estimate

Valuation estimate

Number of profiles

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 Youngdahl Consulting Group