Koopmann Group

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.

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

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

• Cable testing services
• Energy engineering services
• Network station construction
• Transformer maintenance services
• Electrical installation services

Headquarters

HQ city

Cloppenburg

HQ country

Germany

HQ region

Europe

Offices17 records

Markets served

Offering type

Services

Cost components

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

Revenue model

1. Cable Testing Services: Cable fault location, testing, and diagnostics services for energy cable systems - core service offering
2. Energy Systems Services: Planning, assembly, commissioning, maintenance, repair and diagnostics of energy technology plants
3. Network Stations: Sale of prefabricated network stations including innovative wood-based stations
4. Transformer Services: Transformer maintenance, repair, oil analysis and transformer trading through Trafo-Service-Center
5. Rental Stations: Mobile rental stations for temporary energy supply needs
6. Retrofit Services: Retrofitting of legacy equipment including air-blast circuit breakers

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels11 records

Core 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

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

Feature6 records

Partnerships

Eleven partnerships are on record, tiered core and minor.

• EWE NETZcoreStrategic or Co-development Partner · 19 January 2026Strategic 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 GmbHcoreStrategic or Co-development Partner · 13 January 2026Integrated 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.
• TenneTcoreStrategic or Co-development PartnerExclusive contract for offshore cable fault response. KOOPMANN developed offshore measurement container and provides 24/7 on-call service for cable faults at sea.
• MANcoreStrategic or Co-development PartnerPartnership for E-mobility charging infrastructure. KOOPMANN as holistic service provider for energy and charging infrastructure. Collaboration announced February 2025.
• IAM-SminorChannel Partner/ Reseller/ DistributorPartner company listed on website
• KOOPS RAUMWERK (HKC Immobilien)minorStrategic or Co-development PartnerReal estate/space planning partner for company properties
• IPH Institut BerlincoreTechnology or IntegrationTesting and certification institute for wooden network stations. KOOPMANN first company to have wooden transformer station certified by IPH.
• Kärnten NetzminorStrategic or Co-development PartnerPartnership for first wooden 20-kV transformer station in Austria (January 2026)
• Handwerkskammer OldenburgminorOthersAwarded 'Handwerk – gemeinsam für mehr Nachhaltigkeit' recognition. Chamber representing crafts sector.
• Allianz für Cyber-Sicherheit (ACS)minorOthersActive participant in BSI (Bundesamt für Sicherheit in der Informationstechnik) Cyber Security Alliance
• Bundesverband Nachhaltige Wirtschaft e.V. (BNW)minorOthersMember of Federal Association for Sustainable Business since June 2025

Scale indicators6 records

Recent moves7 records

Expansion highlights7 records

Broad 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

• YouTubeyoutube.com/channel/UCP6vxhZkW8PNvmlnnIdRMww
• Facebookfacebook.com/elektrokoopmann
• LinkedInlinkedin.com/company/koopmann-energie-und-elektrotechnik
• Instagraminstagram.com/koopmanngruppe
• TikToktiktok.com/@koopmanngruppe

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries11 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 Koopmann Group