Nelson Geotechnical Associates

Name

Nelson Geotechnical Associates

Legal name

Nelson Geotechnical Associates, Inc.

Website

https://nelsongeotech.com

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

11–50 employees

Ownership category

akta.pro rank

Product category

Geotechnical Engineering Services

NAICS

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

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 Investigation & Site Characterization (Boreholes, In-situ Testing, Lab Testing) (IMAFAOAG), Geotechnical Instrumentation & Monitoring (Settlement, Inclinometers, Piezometers) (IMAFAOAH), Geotechnical, Hydrogeological & Seismic Engineering (Slope Stability, Ground Support, Dewatering) (IMAKAOAN)

Keywords

• Geotechnical engineering
• Subsurface investigations
• Foundation design
• Slope stability analysis
• Construction monitoring

Headquarters

HQ city

Woodinville

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Geotechnical Engineering Services: Project-based professional services revenue from geotechnical investigations, subsurface evaluations, foundation design, slope stability analysis, and construction monitoring. Services are billed on a per-project basis with fees based on scope of work, site complexity, and project duration.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Nelson Geotechnical Associates provides geotechnical engineering consulting services including subsurface investigations, foundation design, slope stability and landslide analysis, construction monitoring, environmental remediation support, coastal/marine infrastructure, and expert witness testimony. The firm applies soil and rock mechanics principles to evaluate site conditions, develop practical solutions, and deliver services from preliminary evaluation through full construction inspection.

Product overview

Nelson Geotechnical Associates (NGA) is a geotechnical engineering consulting firm that provides technically advanced, sophisticated solutions from design through construction phase of projects. The company offers a comprehensive suite of geotechnical services including Development Services, Environmental Services, Coastal & Marine Services, Expert Witness Services, Infrastructure Services, and Landslides & Slope Stability Services. These services include preliminary and final evaluations, subsurface investigations, foundation design, and full construction monitoring and inspection services. NGA operates as part of MacKay and will officially transition to the MacKay brand in September 2026.

Differentiator

Problem solved

Functional benefit

Products and services

• Development Services Geotechnical support for private developers and property owners developing, renovating, or decommissioning property, including geotechnical explorations and construction monitoring.
• Environmental Services Geotechnical and environmental assessments to minimize or avoid adverse environmental effects and provide full hazardous site remediation support for contaminated and degraded sites.
• Coastal & Marine Services Geotechnical engineering for coastal and marine infrastructure including marina design and installation to maintain and protect coastal habitats.
• Expert Witness Services Litigation support and expert testimony services in geotechnical engineering, including depositions, trial appearances, and written and verbal statements.
• Infrastructure Services Geotechnical engineering for public infrastructure design and repair including roadways, bridges, tunnels, culverts, pavement design, stormwater monitoring, and fish passage restoration.
• Landslides & Slope Stability Services Assessment of static and dynamic stability of natural and man-made slopes including landslide analysis, forensic studies, bluff studies, fault mapping, seismicity analysis, reinforcement design, drainage mitigation, and shoring wall design.
• Geotechnical Engineering Consulting Subsurface investigations, foundation design, and construction monitoring applying principles of soil and rock mechanics to evaluate site conditions, quantify risks, and develop practical innovative solutions.
• Laboratory Testing Services Soil and concrete laboratory testing for construction quality assurance.

Quantifiable outcome

• 25+ years serving Washington State geotechnical market
• +1 more outcomes

Named customers8 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

Feature5 records

Partnerships

One partnership is on record.

• MacKaycoreStrategic or Co-development Partner · 1 January 2025Nelson Geotechnical Associates is now part of MacKay, a multi-disciplinary engineering, surveying, environmental, and construction services firm serving clients across the United States. NGA provides technically advanced geotechnical solutions while benefiting from MacKay's expanded resources, broader expertise, and national reach. The transition to the MacKay brand is planned for September 2026, with NGA continuing to operate under its existing brand during the phased transition. This partnership provides employees with expanded career opportunities and broader project exposure.

Scale indicators2 records

Recent moves7 records

Expansion highlights4 records

Broad incumbents

• Terracon: Large national consulting firm providing geotechnical, environmental, construction materials, and facilities services. Overlaps significantly with NGA's service portfolio but at much greater scale and geographic breadth.
• Kleinfelder: National engineering, consulting, and construction management firm with substantial geotechnical practice. Comparable service lines but operates at significantly larger scale across multiple geographies.
• WSP (formerly Golder Associates): Global engineering and consulting firm with extensive geotechnical and earth sciences practice following Golder acquisition. Comparable subsurface, foundation, and mining remediation services at global scale.

Direct peers

• Haley & Aldrich: Geotechnical and environmental engineering firm with deep expertise in subsurface investigations, foundation design, and environmental remediation serving public and private clients — closely comparable to NGA's service portfolio.
• Landau Associates: Pacific Northwest geotechnical and environmental consulting firm with services spanning site characterization, foundation engineering, and environmental remediation — comparable in regional focus, service mix, and client segments.
• GeoEngineers: Pacific Northwest-based geotechnical and environmental consulting firm with overlapping service lines (subsurface investigation, foundation design, slope stability, environmental remediation). Most directly comparable to NGA given similar regional focus, service mix, and client base.
• Aspect Consulting: Pacific Northwest geotechnical, environmental, and water resources consulting firm with overlapping services in foundation engineering, slope stability, and site characterization.
• Shannon & Wilson: Geotechnical and environmental engineering consulting firm with strong Pacific Northwest presence, offering subsurface investigations, foundation engineering, and slope stability — directly comparable in service mix and regional client base.
• Hart Crowser (now Haley & Aldrich): PNW-based geotechnical and environmental consulting firm (now part of Haley & Aldrich) with comparable service lines including slope stability, foundation engineering, and site remediation.

Regional players

• Foundation Engineering: Pacific Northwest geotechnical consulting firm providing foundation design, slope stability, and construction monitoring services. Directly comparable service mix though primarily Oregon-based rather than Washington.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles18 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 Nelson Geotechnical Associates