Koopmann Group
Koopmann Group is a German family-owned energy and electrical engineering company operating 15 branches with 500+ staff, serving network operators, energy suppliers, and industrial clients as the largest private cable testing provider for energy cable systems, with adjacent offerings in transformer services, sustainable wood network stations, and E-mobility infrastructure.
- Company typePrivate
- Founded1982
- HeadquartersCloppenburg, Germany
- Headcount101–250
- GTM type—
- OfferingServices
What Koopmann Group does
Koopmann Group (KOOPMANN Gruppe, operating under HKC Holding GmbH) is a German family-owned energy and electrical engineering company founded in 1982 in Cloppenburg. It is the largest private cable testing service provider in Germany for energy cable systems and operates across 15 nationwide branch locations with 24/7 emergency response coverage, employing over 500 staff as of 2025. The company serves network operators, energy suppliers, and industrial enterprises with a comprehensive service portfolio spanning cable fault location and diagnostics, transformer maintenance and oil analysis (Trafo-Service-Center), network station manufacturing, protection and control technology, offshore cable fault response (exclusive contract with TenneT), retrofit services, E-mobility charging infrastructure, and lightning protection.
The company's product and technology base centers on specialized diagnostic equipment and prefab network stations. Notable proprietary assets include 'The Beast' — the world's most powerful VLF (Very Low Frequency) cable testing system — an in-house transformer oil analysis laboratory, a mobile offshore measurement container, and a proprietary KOOPS-KI AI system for smart work management launched in October 2025. Its principal product innovation is the IPH-certified wood-construction network station (Netzstationen in Holzbauweise), manufactured at the new 20,000m² Energiewerk facility in Cloppenburg, which delivers up to 5.5 tonnes CO2 savings per station versus conventional concrete alternatives and is supplied to customers including EWE NETZ, Kärnten Netz, and Brainergy Park Jülich.
Koopmann's revenue model is predominantly B2B professional services with project-based pricing under multi-year maintenance and emergency-response contracts, complemented by hardware sales of network stations and a managed mobile rental station offering. The company is led by second-generation owner Lothar Koopmann alongside managing directors Martin Frangen and Andrea Suhl. Growth has been driven by a combination of organic branch expansion and acquisitions, with the Roubrocks und Trabert Holzbau GmbH integration in January 2026 marking the most recent move to vertically secure wood construction capabilities for its sustainable station product line.
Koopmann Group firmographics
Firmographics- Name
- Koopmann Group
- Legal name
- HKC Holding GmbH
- Website
- https://hk-c.de
- Company type
- Private
- Founded year
- 1982
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- Koopmann Group is a German family-owned energy and electrical engineering company operating 15 branches with 500+ staff, serving network operators, energy suppliers, and industrial clients as the largest private cable testing provider for energy cable systems, with adjacent offerings in transformer services, sustainable wood network stations, and E-mobility infrastructure.
- Ownership category
- akta.pro rank
Koopmann Group industry classification
Industry- Product category
- Energy and Electrical Engineering Services
- NAICS
- Switchgear and Switchboard Apparatus Manufacturing (335313), Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Electric Power Transmission, Control, and Distribution (22112)
- SIC
- Switchgear & Switchboard Apparatus (3613), Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Electronic Coils, Transformers & Other Inductors (3677)
- akta.pro primary industry
- High-Voltage Electrical Systems (Switchgear, Transformers, Protection & Control) (EUAEAFAA)
- akta.pro secondary industries
- Protection, Control & SCADA/Automation Installation (Relay Panels, RTUs) (IMAFAHAF), Protection, Control & Relaying (Settings, Coordination, Anti-Islanding) (EUAMAIAE), SCADA & Telemetry Software (Control Center) (EUADAEAD), Interconnection Hardware & Substation Integration (Transformers, Switchgear, Breakers, Metering) (EUAMAIAK)
Keywords
Where Koopmann Group is headquartered
LocationHeadquarters
- HQ city
- Cloppenburg
- HQ country
- Germany
- HQ region
- Europe
Offices17 records
Markets served
Koopmann Group business model
Business model- Offering type
- Services
- Cost components
- Personnel, Operations, Supply Chain, Infrastructure, Technology or R&D, Marketing or Sales
Revenue model
- Cable Testing Services: Cable fault location, testing, and diagnostics services for energy cable systems - core service offering
- Energy Systems Services: Planning, assembly, commissioning, maintenance, repair and diagnostics of energy technology plants
- Network Stations: Sale of prefabricated network stations including innovative wood-based stations
- Transformer Services: Transformer maintenance, repair, oil analysis and transformer trading through Trafo-Service-Center
- Rental Stations: Mobile rental stations for temporary energy supply needs
- Retrofit Services: Retrofitting of legacy equipment including air-blast circuit breakers
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Custom project-based pricing for energy and electrical services |
Go-to-market motion1 record
Distribution channels1 record
Marketing channels11 records
Koopmann Group product offering
Product offeringCore offering
Koopmann Group is a German energy and electrical engineering services provider specializing in cable testing, fault location, and diagnostics for energy cable systems. The company designs, assembles, and services network stations (including innovative wooden substations), maintains and repairs transformers, and delivers protection, control, retrofit, offshore, E-mobility, lightning protection, and photovoltaic services to network operators, energy suppliers, and industrial clients.
Product overview
KOOPMANN Group is a full-service provider for energy and electrical engineering in Germany, offering both products and comprehensive services. Their core products include network stations (Netz-Stationen) available in conventional and innovative wood construction (Netzstationen in Holzbauweise), as well as protection modules. The company operates as the largest private cable testing service provider for energy cable systems, complemented by services spanning project planning, installation, commissioning, maintenance, repair, and diagnostics of energy-technical systems. The product portfolio connects directly with their service offerings including cable technology, switchgear, transformers, protection and control technology, offshore services, E-mobility infrastructure, photovoltaic systems, building technology, lightning protection, and retrofit solutions. The company has recently innovated with sustainable wood-based network stations that significantly reduce CO2 emissions compared to conventional concrete stations.
Differentiator
Problem solved
Functional benefit
Brands
- HKC Netzstationen in Holzbauweise: Sustainable wooden network stations as eco-friendly alternatives to concrete stations, featuring nearly CO2-neutral production and 100% recyclability.
- Energiewerk
Products and services
- Cable Testing and Diagnostics Services (Kabelmesstechnik)
- Cable Fault Location Services (Kabelmesstechnik / Kabel)
- Wood Network Stations (Netzstationen in Holzbauweise)
- Conventional Network Stations (Netz-Stationen)
- Transformer Services (Trafo-Service-Center)
- Mobile Rental Stations (Mietstationen)
- Energy Systems Services (Energieanlagen)
- Protection and Control Technology Services (Schutz- & Leittechnik)
- Retrofit Services and Schutzmodul (Protection Module)
- Switchgear Services (Schaltgeräte)
- Offshore Cable Fault Response Services
- E-Mobility Charging Infrastructure Services
- Lightning Protection Services (Blitzschutz)
- Building Technology Services (Gebäudetechnik)
- Photovoltaic Systems Services
Quantifiable outcome
- Wood network stations save up to 5.5 tonnes CO2 per unit compared to concrete stations
- +4 more outcomes
Companies that use Koopmann Group
Customer profileNamed customers8 records
Segments4 records
Ideal customer profiles4 records
Koopmann Group technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature6 records
Koopmann Group partnerships and signals
Strategic signalPartnerships
Eleven partnerships are on record, tiered core and minor.
- EWE NETZcoreStrategic partnership for implementing wooden network stations in EWE NETZ supply area. First wooden network station installed in Stadt Leer. Joint project for sustainable energy infrastructure with up to 5.5 tonnes CO2 savings per station.
- Roubrocks und Trabert Holzbau GmbHcoreIntegrated into KOOPMANN Group in January 2026. Partner in development of wooden network stations. Thomas Trabert continues with his team. Previously joint development of first wooden transformer stations.
- TenneTcoreExclusive contract for offshore cable fault response. KOOPMANN developed offshore measurement container and provides 24/7 on-call service for cable faults at sea.
- MANcorePartnership for E-mobility charging infrastructure. KOOPMANN as holistic service provider for energy and charging infrastructure. Collaboration announced February 2025.
- IAM-SminorPartner company listed on website
- KOOPS RAUMWERK (HKC Immobilien)minorReal estate/space planning partner for company properties
- IPH Institut BerlincoreTesting and certification institute for wooden network stations. KOOPMANN first company to have wooden transformer station certified by IPH.
- Kärnten NetzminorPartnership for first wooden 20-kV transformer station in Austria (January 2026)
- Handwerkskammer OldenburgminorAwarded 'Handwerk – gemeinsam für mehr Nachhaltigkeit' recognition. Chamber representing crafts sector.
- Allianz für Cyber-Sicherheit (ACS)minorActive participant in BSI (Bundesamt für Sicherheit in der Informationstechnik) Cyber Security Alliance
- Bundesverband Nachhaltige Wirtschaft e.V. (BNW)minorMember of Federal Association for Sustainable Business since June 2025
Scale indicators6 records
Recent moves7 records
Expansion highlights7 records
Koopmann Group competitors and assessment
Company assessmentBroad incumbents
- Eaton: Global power management company with significant electrical equipment and services operations in EMEA. Comparable to KOOPMANN's switchgear and network-station business, though Eaton operates across multiple product categories rather than as a regional specialist.
- Siemens Energy: Global energy technology incumbent covering generation, transmission, and grid services. Comparable at the level of T&D services and grid automation to KOOPMANN, but with vastly greater scale and a portfolio rather than specialist positioning.
- DEHN SE: German family-owned manufacturer of lightning protection, surge protection, and electrical safety products. Overlaps with KOOPMANN's Blitzschutz (lightning protection) service line and shares a similar Mittelstand heritage with broad electrical-engineering service scope.
- Megger: Global incumbent in electrical test and measurement equipment, including cable diagnostics (incorporating SebaKMT). Broader and more global than KOOPMANN but operates in the same cable-testing category for utility customers.
- ABB: Global electrification, motion, and process automation incumbent. ABB's Electrification Service business competes broadly with KOOPMANN across switchgear, transformers, and grid services, though ABB operates at far larger scale and across multiple geographies.
Direct peers
- Omicron Electronics: Austria/Germany-headquartered provider of testing, diagnostics, and monitoring solutions for electrical power systems. Comparable to KOOPMANN's cable and transformer diagnostic service portfolio, with overlapping customer base in European utilities.
- Maschinenfabrik Reinhausen (MR): German-based global market leader in power transformer tap-changers and a significant transformer-services provider. Closely comparable to KOOPMANN's Trafo-Service-Center operations and transformer maintenance/oil-analysis capabilities.
- BAUR GmbH: Austria-headquartered manufacturer of VLF cable testing and diagnostics systems (e.g., frida, viola series). Direct competitor to KOOPMANN's cable-testing service offering and a potential technology/equipment counterpart for the same end customers (utilities and network operators).
- Driescher Wegberg: German manufacturer of switchgear, network stations, and medium-voltage equipment. Directly comparable to KOOPMANN's Netz-Stationen (Network Stations) product line and Schaltgeräte (switchgear) services, serving the same German utility customer base.
Regional players
- Kortmann Elektrotechnik: Regional German electrical engineering and network station provider, listed among KOOPMANN's technology partners for wooden network stations. Comparable regional competitor and potential partner within the same Mittelstand segment.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Koopmann Group social profiles
Digital presenceKoopmann Group compliance and trust
Trust signalCompliance4 records
Koopmann Group financial estimates
Financial estimateRevenue estimate
Valuation estimate
Koopmann Group leadership team
Management profileNumber of profiles
Profiles5 records
Koopmann Group subsidiaries and ownership
Company hierarchySubsidiaries11 records
Koopmann Group funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Koopmann Group M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Koopmann Group
What does Koopmann Group do?
Koopmann Group is a German energy and electrical engineering services provider specializing in cable testing, fault location, and diagnostics for energy cable systems. The company designs, assembles, and services network stations (including innovative wooden substations), maintains and repairs transformers, and delivers protection, control, retrofit, offshore, E-mobility, lightning protection, and photovoltaic services to network operators, energy suppliers, and industrial clients.
Is Koopmann Group a public or private company?
Koopmann Group is a private company. It is classified as family owned and is currently operating.
When was Koopmann Group founded?
Koopmann Group was founded in 1982. It employs 101 to 250 people.
Where is Koopmann Group based?
Koopmann Group is headquartered in Cloppenburg, Germany, in the Europe region.
How does Koopmann Group make money?
Six revenue lines are on record. Cable Testing Services are the primary driver. The others are energy Systems Services, network Stations, transformer Services, rental Stations and retrofit Services.
Who are Koopmann Group's main competitors?
Broad incumbents on record are Eaton, Siemens Energy, DEHN SE, Megger and ABB. Direct peers are Omicron Electronics, Maschinenfabrik Reinhausen (MR), BAUR GmbH and Driescher Wegberg. Kortmann Elektrotechnik is listed as a regional player.
Does Koopmann Group have an API?
No public API is recorded for Koopmann Group.
What industry is Koopmann Group in?
Koopmann Group's product category is Energy and Electrical Engineering Services. Its primary akta.pro industry code is EUAEAFAA, High-Voltage Electrical Systems (Switchgear, Transformers, Protection & Control), with a secondary code of IMAFAHAF, Protection, Control & SCADA/Automation Installation (Relay Panels, RTUs). Its NAICS code is 335313 and its SIC code is 3613.