Dr. Spang

What Dr. Spang does

Dr. Spang Ingenieurgesellschaft für Bauwesen, Geologie und Umwelttechnik mbH is a German family-owned geotechnical engineering services firm headquartered in Witten, North Rhine-Westphalia, founded in 1980 and led by managing directors Christian Spang and Christoph Spang. The company employs more than 320 qualified engineers and scientists across 10 German branch offices (Witten, Berlin/Brandenburg, Esslingen, Frankfurt am Main, Freiberg, Hamburg, Hannover, München, Naumburg, Nürnberg) plus one site in Kufstein, Austria.

The firm delivers project-based professional services across 11 competency areas: geotechnics, abandoned mining, contaminated sites and environment, evidence documentation, rock construction, groundwater, nature and soil protection, planning/structural engineering, tunneling, field/laboratory analysis, and on-site construction supervision. Underpinning delivery are two company-owned geotechnical laboratories in Witten and Naumburg (with RAP testing capability) and digital tooling including BIM-based 'Baugrund' subsoil modeling and drone-based surveying with real-time monitoring.

Revenue is generated through project-by-project engineering consulting engagements priced by scope, complexity, and duration, sold directly to infrastructure operators, federal and state authorities, and private construction clients via enterprise field sales. Customers are predominantly German public-sector entities — notably DB InfraGO AG and DB Netz AG (railway), Autobahn GmbH (highways), state road authorities such as Hessen Mobil, municipalities including Bezirksregierung Arnsberg and Senatsverwaltung Berlin, as well as energy clients TenneT TSO, Open Grid Europe, and BGE for nuclear repository work. The company is ISO 9001 certified and has held Familienfreundliches Unternehmen certification since 2020, recertified in March 2026.

Name

Dr. Spang

Legal name

Dr. Spang Ingenieurgesellschaft für Bauwesen, Geologie und Umwelttechnik mbH

Website

https://dr-spang.de

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

11–50 employees

Short description

Dr. Spang is a family-owned German geotechnical engineering consultancy, founded 1980, employing 320+ staff across 11 offices in Germany and Austria. It delivers project-based subsoil investigation, tunneling, construction supervision, and environmental services primarily to public-sector infrastructure operators including Deutsche Bahn, Autobahn GmbH, and federal and state authorities.

Ownership category

akta.pro rank

Product category

Geotechnical Engineering Services

NAICS

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

SIC

Services-Engineering Services (8711), Services-Testing Laboratories (8734)

akta.pro primary industry

Geotechnical & Subsurface Engineering Consulting (BPAHAIAB)

akta.pro secondary industries

Geotechnical Instrumentation & Monitoring (Settlement, Inclinometers, Piezometers) (IMAFAOAH), Geotechnical Site Investigation & Engineering Geology (Borings, Lab Testing) (EUAHAFAE), Water, Wastewater & Hydraulics Engineering Consulting (BPAHAIAD)

Keywords

• Geotechnical engineering
• Soil mechanics consulting
• Tunnel construction engineering
• Foundation engineering services
• Construction supervision

Headquarters

HQ city

Witten

HQ country

Germany

HQ region

Europe

Offices11 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Geotechnical engineering consulting: Project-based engineering consulting services including site investigations, expert opinions, construction planning, and technical supervision for all phases of construction projects

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Dr. Spang provides project-based geotechnical engineering consulting services across the full construction lifecycle, covering site investigation, expert opinions, construction planning, and technical construction supervision. The firm supports clients in all HOAI service phases through competency centers in geotechnics, abandoned mining, contaminated sites and environment, evidence documentation, rock construction, groundwater, nature and soil protection, structural planning, and tunnel construction, complemented by in-house laboratories in Witten and Naumburg for soil and rock mechanics testing.

Product overview

Dr. Spang is a geotechnical engineering services company offering a comprehensive suite of specialized services. The company operates through competency centers covering geotechnics, abandoned mining, contaminated sites and environmental protection, evidence documentation, rock construction, groundwater management, nature and soil protection, structural planning, tunnel construction, and field/laboratory services. The portfolio is delivered as integrated consulting services rather than standalone software products, with in-house laboratories in Witten and Naumburg providing soil and rock investigation capabilities. Key service modules include engineering geology, structural engineering, hydrogeology, environmental impact assessment, project management, expert opinions, and the Dr. Spang Akademie for internal knowledge exchange.

Differentiator

Problem solved

Functional benefit

Products and services

• Geotechnik (Geotechnics) Classical ground investigation services including soil analysis, site assessments, and geotechnical measurements for construction projects; the company's largest department, supported by in-house exploration teams.
• Altbergbau (Abandoned Mining) Research and assessment of mining conditions for new construction projects and existing structures, including exploration and safety measures for former mine workings.
• Altlasten & Umwelt (Contaminated Sites & Environment) Expert analysis enabling environmentally compatible recycling and disposal of construction materials, including contamination assessment, remediation planning, and sustainable soil and waste management.
• Beweissicherung (Evidence Documentation) Optical and structural documentation of buildings, structures, roads and areas, including damage assessments with monetary valuations and vibration measurements before, during and after construction works.
• Felsbau (Rock Construction) Rockfall, rockslide and slope protection through prior exploration and engineering measures, including rope-assisted stability assessments and rock face securing works.
• Grundwasser (Groundwater) Prior measurement series, pumping tests, groundwater monitoring, and hydraulic calculations to protect groundwater and new structures from construction impacts.
• Natur- und Bodenschutz (Nature and Soil Protection) Foresighted planning and monitoring for construction projects in sensitive natural areas, addressing nature and soil protection requirements.
• Planung / Statik (Planning / Structural Engineering) Object and structural planning covering special civil engineering, bridge construction, underground construction, hydraulic engineering, flood protection, and damage assessment across HOAI service phases.
• Tunnel (Tunnel Construction) Ground investigation services covering entire tunnel construction projects, including BIM-based Baugrund assessments, geological mapping of emergency niches, and rehabilitation engineering.
• Feld & Labor (Field & Laboratory Services) Company-owned laboratories in Witten and Naumburg providing state-of-the-art technology and experienced teams for precise soil and rock investigations, foundation engineering tests, and environmental field trials.
• Baubegleitung (Construction Supervision) On-site construction supervision and monitoring services during execution phases of construction projects, including specialist construction supervision for drilling sites and bridge works.
• SiGeKo (Safety and Health Protection Coordination) Safety and health protection coordination according to the German Construction Site Ordinance (Baustellenverordnung) for planning and execution phases of construction projects.
• Sachverständigengutachten (Expert Opinions) Expert opinions on disrupted construction processes, compensation and construction time extension claims, and construction damage assessment.

Quantifiable outcome

• Successful exploration and securing of four mining shafts on school grounds within holiday timeframe
• +2 more outcomes

Named customers20 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Hochschule partnershipscoreStrategic or Co-development PartnerUniversity partnerships for research collaborations and teaching, combining practical and theoretical knowledge for the benefit of clients. The Dr. Spang Academy enables effective knowledge exchange among employees.
• Agentur für ArbeitminorChannel Partner/ Reseller/ DistributorGerman Federal Employment Agency used for job postings and recruitment services.
• Deutsche BahncoreStrategic or Co-development PartnerLong-term client relationship for railway infrastructure projects including tunnel rehabilitation, bridge construction, and evidence documentation for major station redevelopment projects.
• SAMSON AGcoreStrategic or Co-development PartnerSupporting the MainChange project - the largest investment in SAMSON's 116-year history for factory conversion and new construction at their German production site.
• Aktion Mensch e.V.minorOthersAnnual lottery participation supporting social projects. Dr. Spang contributes to over 10,000 social projects annually through this partnership, with a focus on Menschen(s)kinder Bochum GmbH for inclusion projects.

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Ramboll: European engineering, architecture, and consultancy firm with strong transport, environment, and energy practices including geotechnical work in Germany and the Nordics. Comparable client base (rail, road authorities) and overlapping competencies in environmental and tunneling consulting.
• WSP: Global engineering professional services firm with a strong geotechnical practice (post-Golder acquisition) serving transport, energy, and property clients. Comparable to Dr. Spang across rail, highway, and energy infrastructure projects but at much larger global scale.
• Sweco: Nordic-headquartered engineering consultancy with growing Central European presence, offering geotechnical, environmental, and infrastructure design services. Comparable in serving public infrastructure clients, though primarily competing in the Nordics and Benelux rather than Germany specifically.
• Arcadis: Global design and engineering consultancy with substantial geotechnical, environmental, and infrastructure capabilities serving rail, highway, and energy clients. Competes with Dr. Spang on large public-sector infrastructure tenders in Germany and Europe, but as part of a broader portfolio rather than a pure-play specialist.
• CDM Smith: Global engineering and construction firm with environmental, geotechnical, and transportation practices. Overlaps with Dr. Spang on contaminated site remediation (Altlasten), water, and transport infrastructure consulting.
• Tractebel (ENGIE): Belgian engineering consultancy (part of ENGIE) active in energy, infrastructure, and water with geotechnical and tunneling capabilities. Comparable on large infrastructure and energy-transition projects in Europe where Dr. Spang also competes.

Direct peers

• Fugro: Global geotechnical and geoscience specialist offering site investigation, soil/rock laboratory testing, and asset integrity monitoring. Direct peer in the same core service lines (subsoil investigation, geotechnical consulting, lab testing) but operating at significantly larger international scale than Dr. Spang.
• Golder Associates (now part of WSP): Pre-acquisition Golder was a globally recognized geotechnical and environmental consulting firm with soil/rock laboratories and mining heritage practice—closely overlapping Dr. Spang's Altbergbau and Altlasten competencies and now embedded within WSP.
• Smoltczyk & Partner (地基 Smoltczyk): German geotechnical engineering consultancy offering subsoil investigation, foundation engineering, and tunneling services. Closest direct German peer to Dr. Spang in scale, service portfolio, and client base (rail, highway, municipal).
• GuD Geotechnik: Berlin-based German geotechnical engineering firm specializing in foundation engineering, tunnel construction, and groundwater consulting. Direct mid-sized German peer with similar competency-center structure and public-sector client mix.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xxing.com/pages/dr-spangingenieurgesellschaftfurbauwesengeologieundumwelttechnikmbh
• LinkedInlinkedin.com/company/dr-spang-ingenieurgesellschaft

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 Dr. Spang