d2 consult

What d2 consult does

d2 consult (commercially known as Tunnelconsult, now operating as Tunnelconsult, A TYLin Company) is a Vienna-headquartered specialist engineering consulting firm providing tunnel and ground engineering services for underground infrastructure projects. Founded in 2004, the firm delivers consulting, design, and monitoring services across the lifecycle of underground works, serving government agencies, public entities, private entities, and construction companies across European and international markets. Its marquee engagements include the Świnoujście Tunnel in Poland, the 3-Deck Great Istanbul Tunnel in Turkey, the Brenner Base Tunnel spanning Austria and Italy, the Saida Mannoubia Tunnel in Tunisia, and the Arroyo Vega Second Flood Relief Tunnel in Argentina.

The firm operates a professional services model, with revenue generated through project-based consulting engagements and direct B2B relationships with enterprise and public-sector clients. Services are delivered through offices in Austria, Poland, and Italy, supplemented by a Turkey partnership (TMD, established 2013) and reach into other European and Latin American markets. The firm achieved ISO 9001 quality management certification in 2018 and has progressively built a multi-country presence. In 2023 it strategically aligned with GPO Group and TYLin, and in 2024 it was fully integrated into TYLin, a global engineering firm, becoming the European platform for TYLin's tunnel and underground infrastructure expertise. Under TYLin, the firm leverages the parent's global marketing, recruitment, and project delivery infrastructure while retaining its specialist focus on tunnels and ground engineering.

Name

d2 consult

Website

https://d2consult.eu

Company type

Private

Founded year

2004

Operating status

Operating

Short description

d2 consult (Tunnelconsult, A TYLin Company) is a Vienna-based specialist engineering consultancy providing tunnel and ground engineering consulting, design, and monitoring services to government agencies, public entities, private clients, and construction companies across European and international markets.

Ownership category

akta.pro rank

Product category

Engineering Consulting Services

NAICS

Engineering Services (54133), Architectural, Engineering, and Related Services (5413)

SIC

Services-Engineering Services (8711), Services-Engineering, Accounting, Research, Management (8700)

akta.pro industry

PRIMARYBPAHAIAB

Geotechnical & Subsurface Engineering Consulting

Business & Public Services/Professional Services (Legal, Accounting, Consulting)/Engineering & Technical Consulting

SECONDARYBPAHAIAC

Transportation & Traffic Engineering Consulting

Business & Public Services/Professional Services (Legal, Accounting, Consulting)/Engineering & Technical Consulting

Keywords

• Tunnel engineering consulting
• Ground engineering services
• Underground infrastructure design
• Tunnel monitoring services
• Geotechnical engineering consulting

Headquarters

HQ city

Vienna

HQ country

Austria

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Engineering Consulting Services: Professional consulting services for tunnel and underground infrastructure projects including design, monitoring, and technical advisory services delivered to government agencies, public entities, and construction companies.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels7 records

Core offering

d2 consult delivers specialized tunnel and ground engineering consulting, design, and monitoring services for underground infrastructure projects. Services are provided to public and private entities, government agencies, and construction companies across European and international markets, covering the full lifecycle from initial consulting through design and ongoing construction monitoring. The firm is fully integrated into TYLin, a global engineering firm.

Product overview

Tunnelconsult is a specialized engineering consulting firm that operates as a subsidiary of TYLin Group. The company offers a unified portfolio of tunnel and ground engineering services, including consulting, design, and monitoring of underground works. The core offering encompasses specialized tunnel expertise for infrastructure projects across Europe and globally, with the company now fully integrated into TYLin's global engineering operations.

Differentiator

Problem solved

Functional benefit

Products and services

• Tunnel and Ground Engineering Consulting Services Specialized consulting, design, and monitoring services for all types of underground works and tunnel projects. Delivered to public and private entities, government agencies, and construction companies worldwide, covering the full lifecycle from initial consulting through design and ongoing monitoring during construction and operation.

Named customers4 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Three partnerships are on record, tiered core.

• TYLincoreStrategic or Co-development Partner · 1 January 2023Tunnelconsult strategically aligned with GPO Group and TYLin in 2023. By 2024, Tunnelconsult became fully integrated into TYLin, enabling the firm to serve European clients as part of a global engineering organization.
• GPO GroupcoreStrategic or Co-development Partner · 1 January 2023Tunnelconsult strategically aligned with GPO Group and TYLin in 2023 as part of expansion and integration into a larger global engineering network.
• TMD (Tunnelconsult Turkey)coreStrategic or Co-development Partner · 1 January 2013Tunnelconsult expanded into Turkey in 2013 through TMD (Tunnelconsult Turkey), establishing operations in the Turkish market for tunnel and underground engineering projects.

Scale indicators2 records

Recent moves11 records

Expansion highlights4 records

Broad incumbents

• TYLin: Parent organization since full integration in 2024. TYLin is a global engineering firm with rail + transit, aviation, bridge, water, and advisory practices; Tunnelconsult provides its specialized tunnel/underground engineering capability within TYLin's broader multidisciplinary portfolio.
• Mott MacDonald: Global engineering consultancy with deep tunnel and underground infrastructure expertise (e.g., major metro and high-speed rail projects). Comparable as a multidisciplinary infrastructure firm that also competes in tunnel design and underground engineering services.
• WSP Global: Global professional services firm with a dedicated Earth & Environment and Transport & Infrastructure practice including tunnel engineering. Competes for multidisciplinary mandates where tunnel design is bundled with broader rail, transit, or highway scopes.
• Arcadis: Global design and engineering consultancy with mobility and resilience practices covering tunnels, metros, and underground infrastructure. Competes for similar public-sector and concessionaire-led underground project mandates across Europe.
• AECOM: Global infrastructure consulting firm with transportation and tunneling practices delivering design and program management for major underground works. Comparable as a large multidisciplinary peer competing on integrated tunnel + rail bids.
• AtkinsRéalis: Engineering services firm (formerly SNC-Lavalin) with significant tunnel and underground engineering work in transit, hydropower, and road projects. Direct comparable on large public-sector underground infrastructure consulting mandates.
• Jacobs Solutions: Global engineering services firm with critical infrastructure consulting including tunnel, rail, and transit practices. Competes for similar transportation and underground engineering mandates, often as program manager or lead designer.

Direct peers

• COWI: Danish-headquartered engineering consultancy with a renowned tunnels and underground infrastructure practice. Direct peer in geotechnical and tunnel engineering consulting for transport and water infrastructure projects across Europe and globally.
• Amberg Engineering: Swiss-headquartered specialist tunnel and underground engineering consultancy. Closest pure-play peer: similar niche specialization, comparable project types (rail, metro, road tunnels), and competing on European flagship projects like Brenner Base Tunnel.
• Gall Zeidler Consultants: Specialized tunnel and underground engineering consultancy with strong presence on European and North American rail tunnel projects. Directly comparable niche player focused on tunnel design, geotechnical engineering, and construction support services.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/TYLI_Group
• YouTubevimeo.com/tylininternational
• Facebookfacebook.com/tylininternationalgroup
• LinkedInlinkedin.com/company/d2-consult-international-gmbh
• Instagraminstagram.com/tylininternational

Compliance1 record

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 d2 consult