What Lithos Engineering does

Lithos Engineering is a Denver-based specialty engineering consulting firm founded in 2015 that delivers geotechnical, tunnel, trenchless, and geological engineering and design services to infrastructure and construction projects. Its service portfolio spans four interconnected practice areas: geotechnical engineering (site evaluation and risk assessment), tunnel engineering (underground infrastructure design and construction methodology), trenchless engineering (non-invasive underground installation), and geological engineering (analysis of ground conditions to inform design decisions). The firm also references litigation support and forensic engineering capabilities in its broader service description. The company's stated value proposition centers on prudent site evaluations, constructible engineering solutions, and project risk mitigation delivered through collaborative, client-focused consulting.

The firm serves clients requiring engineering expertise for complex infrastructure and construction projects, with infrastructure and construction projects identified as the primary use-case segment. Lithos operates as a project-based consulting business with a horizontal segmentation approach, though no pricing models, contract structures, or specific customer logos are publicly disclosed. Headcount sits in the 11–50 employee range, consistent with a boutique specialty consultancy. The co-founder and president is Robin Dornfest. No software products, technology platform, or proprietary technology assets are disclosed; the offering is entirely human-expert-driven engineering consulting.

Lithos Engineering has been acquired by GEI Consultants, a strategic operating company, and the firm's website now states "Lithos Engineering has joined GEI Consultants." The stated strategic rationale is to combine Lithos's specialized underground and geotechnical expertise with GEI's broader consulting capabilities in order to better serve communities and create "smart, buildable solutions." As a result, Lithos no longer operates as an independent entity, and forward-looking growth, product development, and go-to-market decisions are now made within the GEI platform rather than independently.

Name

Lithos Engineering

Legal name

Lithos Engineering

Website

https://lithoseng.com

Company type

Private

Founded year

2015

Operating status

Acquired

Headcount range

11–50 employees

Short description

Lithos Engineering is a Denver-based specialty engineering consultancy, founded in 2015, providing geotechnical, tunnel, trenchless, and geological engineering and design services to infrastructure and construction projects. The firm has been acquired by GEI Consultants and no longer operates independently.

Ownership category

akta.pro rank

Product category

Geotechnical Engineering Services

NAICS

Engineering Services (54133)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Geotechnical & Subsurface Engineering Consulting (BPAHAIAB)

akta.pro secondary industries

Tunneling & Underground Geotechnics (Ground Treatment, Support, NATM/SEM Interfaces) (IMAFAOAJ), Civil & Structural Engineering Consulting (BPAHAIAA)

Keywords

• Geotechnical engineering
• Tunnel engineering
• Trenchless engineering
• Geological engineering
• Underground infrastructure design

Headquarters

HQ city

Denver

HQ country

United States

HQ region

North America

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Core offering

Lithos Engineering provides specialized engineering consulting and design services across four interconnected disciplines: geotechnical engineering, tunnel engineering, trenchless engineering, and geological engineering. The firm delivers prudent site evaluations, constructible solutions, and project risk understanding through innovative, collaborative, client-focused consulting tailored to construction and infrastructure project needs.

Product overview

Lithos Engineering is a consulting firm offering a unified suite of geotechnical engineering services rather than a software product. The company provides integrated engineering and design consulting across four interconnected service areas: geotechnical engineering, tunnel engineering, trenchless engineering, and geological engineering. These services are delivered through innovative, collaborative, client-focused consulting tailored to meet project-specific needs. The firm joined GEI Consultants to expand its capabilities and better serve communities with smart, buildable solutions.

Differentiator

Problem solved

Functional benefit

Products and services

• Geotechnical Engineering and Design Services Engineering consulting services providing site evaluations, risk assessment, and constructible solutions for geotechnical challenges in construction and infrastructure projects.
• Tunnel Engineering and Design Services Specialized engineering services focused on tunnel design, construction methodologies, and underground infrastructure solutions.
• Trenchless Engineering and Design Services Non-invasive underground construction engineering services enabling infrastructure installation without traditional excavation methods.
• Geological Engineering and Design Services Engineering services analyzing geological conditions to inform site evaluations, risk management, and project design decisions.

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• GEI ConsultantscoreStrategic or Co-development PartnerLithos Engineering has joined GEI Consultants, combining their specialized geotechnical, tunnel, trenchless, and geological engineering expertise with GEI's broader consulting capabilities. This integration aims to better serve communities and create smart, buildable solutions through the unified organization's enhanced service offerings.

Recent moves2 records

Expansion highlights2 records

Broad incumbents

• Jacobs Solutions: Jacobs is a large global engineering and consulting firm with significant tunneling, geotechnical, and critical infrastructure practices, frequently competing for major underground transit and water projects that Lithos also pursues.
• Arup: Arup is a global engineering consultancy with a recognized tunneling and underground infrastructure practice, often engaged on complex transit, water, and energy projects that overlap with Lithos's market.
• WSP USA: WSP is a global engineering consultancy with deep tunneling, geotechnical, and infrastructure capabilities (including legacy Golder Associates). It competes with Lithos on large public infrastructure projects requiring tunnel and subsurface expertise.
• Stantec: Stantec is a multi-disciplinary engineering and consulting firm with active tunneling, geotechnical, and infrastructure practices serving municipal and private clients similar to Lithos's customer base.
• AECOM: AECOM is a global infrastructure consultancy with established tunneling, geotechnical, and construction services practices that compete for the same large-scale underground and infrastructure projects as Lithos.
• GEI Consultants: GEI Consultants is Lithos's parent company and a multi-disciplinary engineering and consulting firm offering water, environmental, geotechnical, and structural services. It now houses Lithos's niche tunneling and trenchless capabilities within a broader service portfolio.

Direct peers

• Haley & Aldrich: Haley & Aldrich is a U.S. geotechnical and environmental engineering consultancy serving infrastructure, energy, and construction clients. Its core geotechnical and subsurface practice overlaps directly with Lithos's geotechnical and geological services.
• Brierley Associates: Brierley Associates is a U.S. engineering consultancy specializing in tunnel, trenchless, and underground infrastructure design — a near-direct overlap with Lithos's core service lines and similar target clients (public agencies, contractors, and developers on complex subsurface projects).
• Delve Underground: Delve Underground (formerly McMillen Jacobs Associates' consulting arm) provides tunnel, underground, and geotechnical engineering services across North America. Its scope of underground engineering and design consulting closely mirrors Lithos's tunnel and trenchless focus.

Emerging players

• Hayward Baker (Keller): Hayward Baker, a Keller company, provides specialty geotechnical construction services including ground improvement and foundation work that often interface with tunnel and trenchless design scopes, making it a relevant adjacent peer in the underground construction value chain.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat2 records

Key risks4 records

Key highlights5 records

Customer concentration

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 Lithos Engineering