What Haesco does

Haesco Limited is a specialist UK electrical engineering services company, founded in 2000 and operating as a wholly-owned subsidiary of the Aardvarc Group from its headquarters in Hebburn, Tyne and Wear. The firm provides high voltage substation engineering services covering voltages from 220V to 400kV, including AIS/GIS switchgear removal, replacement and installation; substation maintenance contracts; control and protection wiring; busbar and asset replacement; LV cable installation and removal of redundant cables; earthing systems including National Grid NSI-24 bridging equipment; commissioning; and a proprietary alumina oxide ceramic coating for corrosion and electrical resistance. Its principal differentiator is the exclusive UK and Ireland agency for Hapam disconnectors, a globally recognised disconnector manufacturer, giving the firm sole rights to sell, support, and service that equipment in the region.

The firm's customer base is concentrated in UK electricity transmission and distribution: National Grid and its alliance partners, the regional Distribution Network Operators (DNOs), and UK power station operators. Notable projects include 400kV disconnector and earth switch installations at two Scottish substations in 2008, a 275kV refurbishment in 2012, and an ongoing programme of 132kV disconnector upgrades across 19 substations in England and Wales from 2009 to the present. The business is credentialed to ISO 9001:2015 (UKAS-accredited via LRQA Ltd), holds Achilles UVDB Verified status with 100% scores across Health & Safety, Environment, and Quality assessments through April 2027, and is a member of Rospa, collectively serving as gating credentials for UK utility procurement.

Haesco generates revenue through professional services engagements (project-based substation installation, refurbishment, and maintenance contracts) and managed services revenue from Hapam equipment sales and support. Marketing and customer acquisition are conducted exclusively through direct enterprise sales via telephone and email enquiries routed through the company website, with no resellers, distributors, or digital channels. The firm is privately held with no disclosed funding rounds, revenue, or leadership changes; all engineering delivery is performed by a small team (11-50 employees) of authorised high voltage engineers operating as a specialist unit within the broader Aardvarc Group.

Name

Haesco

Legal name

Haesco Limited

Website

https://haesco.com

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

11–50 employees

Short description

Haesco Limited is a UK specialist electrical engineering firm providing high voltage substation installation, maintenance, refurbishment, and commissioning services (220V-400kV) to National Grid, DNOs, and power station operators, and is the sole UK and Ireland service agent for Hapam disconnectors.

Ownership category

akta.pro rank

Product category

High Voltage Substation Engineering Services

NAICS

Electric Power Generation, Transmission and Distribution (2211)

akta.pro primary industry

High-Voltage Electrical Systems (Switchgear, Transformers, Protection & Control) (EUAEAFAA)

akta.pro secondary industries

Testing, Commissioning & Energization Services (HV) (EUAEABAI), Medium-Voltage (MV) Distribution Substations & Switchgear (EUADACAB), Distribution Substations & Switching Stations (MV) EPC (EUAEACAC)

Keywords

• High voltage engineering
• Substation services
• Disconnector maintenance
• Switchgear installation
• Earthing services

Headquarters

HQ city

Hebburn-on-tyne

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Infrastructure, Others

Revenue model

1. Engineering Services: Core revenue derived from providing specialist engineering services for high voltage electricity substations, including switchgear installation, maintenance, refurbishment, commissioning, and asset replacement services for voltages up to 400kV.
2. Hapam Equipment Sales and Support: As sole service agent for Hapam (global disconnector manufacturer), the company generates revenue from sales, support, and service of Hapam equipment in the UK and Ireland.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Haesco is a specialist engineering services company providing high voltage substation services at voltages from 220V to 400kV, including AIS/GIS switchgear installation, maintenance, refurbishment, commissioning, earthing, and LV cable installation/removal. As the sole UK and Ireland service agent for Hapam, a global disconnector manufacturer, the company also sells, services, and supports Hapam disconnector equipment for electricity transmission and distribution operators.

Product overview

Haesco is a specialist engineering services company and a subsidiary of Aardvarc Group. It is NOT a software/technology product company but rather provides high voltage substation engineering services. The company offers a portfolio of specialized services including AIS/GIS Switchgear Services, Substation Maintenance Services, Control & Protection Services, Asset Replacement Services, LV Cable Installation & Removal, Corrosion & Protection Technology, Commissioning Services, and Earthing Services. As the sole service agent for Hapam disconnectors in the UK & Ireland, Haesco also delivers disconnector upgrade and installation projects across 132kV, 275kV, and 400kV voltage levels. These services are delivered through a core of highly qualified engineers working with Project and Technical Teams.

Differentiator

Problem solved

Functional benefit

Products and services

• AIS/GIS Switchgear Services Removal, replacement, and installation of all types of AIS/GIS switchgear including support structures, tubular and stranded conductors, earthing systems, strain gantries, and overhead conductors. Offered to UK electricity transmission companies, DNOs, and power stations.
• Substation Maintenance Services Minor and major substation repairs with options for bespoke multi-year maintenance contracts for DNOs, transmission companies, and power stations.
• Control and Protection Services LV multi-core and paired telecommunication cable installation and terminations, secondary wiring modifications, relay panel installation, GPS antenna installation, line trap removal, and busbar reconfiguration works for substations.
• Asset Replacement Services Busbar replacement, crane planning, lift supervision under BS7121, and provision of qualified personnel including electricians, mechanical fitters, supervisors, and managers with Temporary Works Coordinator expertise aligned to National Grid TP154.
• LV Cable Installation and Removal Installation, gland termination, and removal of redundant low voltage cables in congested substation cable trenches for DNOs and transmission companies.
• Corrosion and Protection Technology Specialist alumina oxide-based ceramic coating for corrosion, abrasion, and chemical resistance, providing high electrical resistance similar to porcelain insulators. Originally developed for highly corrosive marine environments, applied under normal room conditions using various application techniques.
• Commissioning Services Commissioning resource with authorisations for power stations, DNOs, and transmission companies for substation works from 220V to 400kV, with test equipment and injection sets available for rental.
• Earthing Services Copper earth mat installation and diversion, including National Grid NSI-24 specialist bridging equipment, copper-to-copper brazed jointing, bolted connections, protection against corrosion for dissimilar metals, earth rods, and exothermic welding capabilities.
• High Voltage Maintenance Contracts 24/7 emergency telephone support, emergency callout, disconnector and earth switch inspection/testing, annual asset surveys, and high voltage technical consultancy up to 400kV.
• Hapam Disconnector Sales and Service Agency Sales, support, and sole service agency for Hapam, a global leader in disconnector manufacture, across UK and Ireland markets. Includes equipment supply and ongoing technical service for Hapam disconnector products.

Quantifiable outcome

• Completed disconnector upgrades at 19 different 132kV substations across England and Wales
• +2 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Four partnerships are on record, tiered core.

• HapamcoreStrategic or Co-development PartnerHaesco operates as the sales, support, and sole service agent for Hapam in the UK and Ireland. Hapam is described as a global leader in disconnector manufacture. This exclusive partnership is central to Haesco's business model, providing access to world-class disconnector technology and enabling the company to offer comprehensive service, support, and sales for Hapam equipment across the UK and Ireland market.
• Aardvarc GroupcoreStrategic or Co-development PartnerHaesco Limited is a specialist engineering business subsidiary of the Aardvarc Group of companies. The parent company structure provides corporate governance and affiliation for Haesco, enabling it to operate as part of a larger group while maintaining its specialist focus on high voltage disconnectors and substation services.
• National GridcoreStrategic or Co-development PartnerHaesco works in coordination with National Grid Alliance partners on CDM areas and operates under National Grid's National Safety Instruction 24 for earthing services, including TP154 temporary works requirements. The company demonstrates comprehensive understanding of National Grid's safety and technical standards for high voltage substation works.
• AchillescoreTechnology or IntegrationHaesco is accredited with Achilles, a leading global provider of integrated supplier management and supply chain solutions. This accreditation provides UVDB Verified status following assessment of Health & Safety, Environment, and Quality management systems, with 100% scores achieved on both Management Systems Evaluation and Onsite Assessment.

Scale indicators4 records

Recent moves2 records

Expansion highlights4 records

Broad incumbents

• Schneider Electric: Schneider Electric offers HV equipment, substation automation, and electrical services for utilities and industrial customers. Broad incumbent with adjacent offerings in substation electrical systems.
• Balfour Beatty: Balfour Beatty's Power Transmission & Distribution business delivers HV overhead lines, substations, and cable installations for UK utilities. Larger infrastructure group with overlapping capabilities in HV substation delivery.
• ABB: ABB manufactures HV switchgear and disconnectors and provides associated service, installation, and commissioning offerings globally. Comparable as an OEM-plus-services peer with adjacent product portfolio.
• Siemens Energy: Siemens Energy supplies HV transmission equipment including GIS switchgear and provides installation, commissioning, and service. Overlaps with Haesco on the equipment-and-service value chain for HV substations.
• Wood Group: Wood provides engineering and asset services to power and utility operators including substation support. Broad energy engineering incumbent with overlapping HV infrastructure service capabilities.
• Vinci Energies (UK): Vinci Energies provides HV electrical infrastructure and substation services through its Omexom brand across the UK. Larger incumbent with comparable transmission and distribution service offerings.

Direct peers

• SPIE UK: SPIE UK provides HV electrical infrastructure services for utilities including substation installation, maintenance, and commissioning. Directly comparable as a multi-disciplinary HV electrical contractor serving UK DNOs and transmission operators.
• Powertecnique: Powertecnique is a UK-based specialist in HV substation services including commissioning, maintenance, and refurbishment. Directly comparable niche HV engineering services peer with similar UK utility customer focus.
• Eltel Group: Eltel is a European specialist in HV power infrastructure services, including substation builds, maintenance, and disconnector services. Highly comparable business model serving electricity utilities across multiple voltage classes.

Emerging players

• McGowan Group: McGowan Group is a smaller UK electrical and HV services contractor with comparable capabilities in substation and transmission infrastructure work. Closely aligned in size and customer focus, making it a relevant emerging peer.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/haesco-ltd

Compliance2 records

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 Haesco