TERRADON Corporation

What TERRADON Corporation does

TERRADON Corporation is a multi-disciplinary civil engineering firm founded in 1989 by Virginia L. King and headquartered in Poca, West Virginia. The firm operates as West Virginia's largest woman-owned engineering company and is family-owned, with King continuing as CEO and her daughters Ashley Lioi (Principal Engineer) and Amelia King Randolph (Geologist) holding ownership positions. TERRADON delivers six integrated core service lines — Environmental Services, Geotechnical Services, Land Development, Survey & Mapping, Testing & Inspection, and Transportation Engineering — supplemented by Construction Management as an add-on service. Underlying technology centers on geospatial capabilities including GPS, drone 3-D mapping, photogrammetric mapping, 3-D terrestrial scanning, and subsurface exploration instrumentation, alongside an AASHTO-accredited materials testing laboratory at the Poca headquarters. The firm also holds a registered patent on a soil bolting system co-invented by Senior Geotechnical Engineer Joe Carte. The firm's project portfolio spans federal agencies (US Army Corps of Engineers, National Parks Service), state DOTs (WVDOT), municipalities (Charleston, South Charleston), universities (Marshall University), and private commercial developers across the Appalachian and Ohio Valley regions.

TERRADON generates revenue through qualifications-based professional services engagements sold via direct business development to government agencies at the federal, state, and local levels, alongside private commercial and industrial clients. Pricing is project-specific and quote-based rather than tiered, with engagements structured as multi-year contracts and individual RFP responses. Customer segments are organized horizontally: Government (Federal, State, Local) and Commercial & Industrial are the two primary segments, with secondary use-case segments in Athletic Facilities, Education, and Energy. Notable marquee projects include the Summit Bechtel Reserve (10,600+ acre National Scouting Center), Bluestone Dam Stabilization Phase 4, Corridor H Sections 3 and 5 value engineering, Tanyard Station Development, and Babcock State Park Sewell Trail.

The firm operates from five offices in Poca (headquarters), Fayetteville, Lewisburg, Morgantown, and Salem, Virginia, with project footprints active in West Virginia, Virginia, North Carolina, Michigan, and Pennsylvania. Delivery is supported by 100 engineering professionals executing approximately 234,000 annual hours on client projects. Go-to-market is enterprise field sales driven by President Ryan Wheeler (appointed February 2026) with explicit emphasis on qualifications-based pursuits and market expansion into government and industrial work. The firm maintains relevant industry certifications including WBENC Women's Business Enterprise, ACI, CWI, CCM, AASHTO, and state-specific credentials, and pursues ongoing professional licensure expansion across operating states.

Name

TERRADON Corporation

Legal name

Terradon Corporation

Website

https://terradon.com

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

101–250 employees

Short description

TERRADON Corporation is a woman-owned, family-operated multi-disciplinary civil engineering firm headquartered in Poca, West Virginia, delivering environmental, geotechnical, land development, survey, testing, and transportation engineering services to federal, state, and local government and commercial clients across the Appalachian and Ohio Valley regions.

Ownership category

akta.pro rank

Product category

Civil Engineering Services

NAICS

Geophysical Surveying and Mapping Services (54136), Environmental Consulting Services (54162), Testing Laboratories and Services (54138)

SIC

Services-Engineering Services (8711), Services-Commercial Physical & Biological Research (8731)

akta.pro primary industry

Mine Surveying & Geospatial Services (Survey, Drone/LiDAR, GIS, Grade Control) (IMAKAKAK)

akta.pro secondary industries

Mineral Exploration & Geoscience Services (Geology, Geophysics, Geochemistry, Resource Modeling) (IMAKAKAA), Minerals, Mining & Geologic Resources Administration (BPAIAMAJ)

Keywords

• Civil engineering services
• Geotechnical engineering
• Environmental consulting
• Land development engineering
• Transportation engineering

Headquarters

HQ city

Poca

HQ country

United States

HQ region

North America

Offices5 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering Consulting Services: TERRADON generates revenue through providing multi-disciplinary engineering services including environmental, geotechnical, land development, survey & mapping, testing & inspection, and transportation engineering to government and private sector clients.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

TERRADON Corporation provides multi-disciplinary civil engineering consulting across environmental, geotechnical, land development, survey & mapping, testing & inspection, and transportation engineering service lines. Services are delivered directly to federal, state, and local government agencies as well as commercial, industrial, educational, and energy clients across the Ohio Valley and Appalachian regions, with construction management offered as an additional oversight service.

Product overview

TERRADON Corporation is a multi-disciplinary engineering firm offering a comprehensive suite of professional engineering services. The company operates as a unified platform of six interconnected core service lines: Environmental Services, Geotechnical Services, Land Development, Survey & Mapping, Testing & Inspection, and Transportation Engineering. These services are delivered across seven market sectors including Athletic Facilities, Civic & Government, Commercial, Education, Energy, Parks & Recreation, and Transportation. The firm is West Virginia's largest woman-owned engineering firm and serves clients throughout the Ohio Valley and Appalachian regions, providing both individual services and integrated multi-disciplinary project delivery. TERRADON also offers Construction Management as an additional service line, enabling them to provide oversight from design through project completion.

Differentiator

Problem solved

Functional benefit

Products and services

• Environmental Services Environmental consulting including site assessments, NEPA compliance, wetland delineation, hazardous waste management, and environmental remediation for projects across the Ohio Valley and Appalachian regions, delivered to government and commercial clients.
• Geotechnical Services Subsurface investigation, foundation design, laboratory testing, and geotechnical advisement for roadways, bridges, water facilities, telecommunications towers, and commercial developments.
• Land Development Site planning, permitting, grading, stormwater management, and construction observation for commercial, industrial, residential, and institutional land development projects.
• Survey & Mapping Boundary surveys, aerial mapping, ALTA/NSPS surveys, hydrographic surveys, GPR surveys, 3D terrestrial scanning, drone mapping, and GIS mapping services for civic, commercial, and private industry clients.
• Testing & Inspection Construction materials testing and inspection including concrete testing, compaction testing, steel inspection, welding certification, and quality assurance/quality control documentation for utility, highway, and commercial projects.
• Transportation Engineering Roadway and bridge design, interchange improvements, geotechnical design for transportation, traffic analysis, and infrastructure rehabilitation using data-driven approaches.
• Construction Management Construction management representative services, daily coordination, QA/QC documentation, and project close-out support for government and private sector construction projects.

Quantifiable outcome

• University Town Centre value engineering added approximately $5 million in commercial value to the site with no increase in development costs, gaining developer approximately 80% return on investment
• +2 more outcomes

Named customers9 records

Segments5 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• Fayette County Urban Renewal AuthoritynotableStrategic or Co-development PartnerCollaborative partnership on Wolf Creek Trail System project where TERRADON provided survey-grade GPS mapping services and project management support for the community-led trail development effort.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Triad Engineering: Multi-disciplinary civil engineering firm headquartered in West Virginia serving public and private clients across the Mid-Atlantic with similar transportation, environmental, geotechnical, and surveying services.
• CTL Engineering: Mid-Atlantic-based civil, environmental, and geotechnical engineering consulting firm with similar testing, inspection, surveying, and infrastructure service lines serving government and commercial clients.
• S&ME: Employee-owned geotechnical, environmental, and construction services firm headquartered in the Southeast with comparable civil engineering, testing/inspection, and surveying offerings for public and private clients.

Broad incumbents

• Michael Baker International: National engineering services and consulting firm operating across transportation, environmental, and federal infrastructure markets with significant USACE and DOT federal contract presence that competes for the same large public-sector pursuits.
• WSP USA: Global professional services firm offering transportation, environmental, geotechnical, and surveying engineering to federal, state, and municipal clients — directly competes for large integrated infrastructure contracts.
• Stantec: International engineering, architecture, and environmental services firm with strong North American presence in transportation and infrastructure work that competes on multi-state public pursuits.
• Tetra Tech: Leading global consulting and engineering firm specializing in water, environment, and sustainable infrastructure, directly competing for federal environmental and geotechnical consulting work.
• TRC Companies: National engineering, consulting, and construction management firm providing environmental, geotechnical, and infrastructure services to government and commercial clients.
• AECOM: Global infrastructure consulting firm providing transportation, environmental, geotechnical, and construction management services to federal and state clients including USACE and DOT procurements.

Regional players

• Patriot Engineering: Mid-sized multi-disciplinary engineering firm serving Indiana, Kentucky, and surrounding states with environmental, geotechnical, and surveying services — comparable scale and service mix in an adjacent geography.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/terradon-corporation

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

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 TERRADON Corporation