What TES Group does

TES Group is a Northern Ireland-based specialist engineering firm operating through two divisions: TES Power, which designs, manufactures, and distributes low voltage power distribution equipment (LV switchgear, PDUs, UL891 PowerPro switchboards, Busduct systems, and Modular Electrical Rooms in POD and Skid configurations) for global hyperscale and colocation data centre operators; and TES Water, which provides MEICA (Mechanical, Electrical, Instrumentation, Control and Automation) services including design, build, operate, commissioning, and maintenance for UK and Ireland water utilities. The company runs a vertically integrated model spanning process design, in-house manufacturing, installation supervision, and commissioning, with capacity for 60+ concurrent modular POD/SKID builds across two manufacturing sites (Cookstown and a new 300,000 sq ft Data Centre campus in Co. Derry). Its technology stack includes BIM 360 / Autodesk Construction Cloud as a Common Data Environment, Remote Factory Acceptance Testing via head-mounted cameras and mainstream video conferencing platforms, IEC and UL dual-certification capability, and bespoke innovations such as a floating pontoon access system for wastewater tank works.

The company's revenue model combines project-based hardware sales for data centre power infrastructure (multi-million euro contracts) with multi-year framework agreements and Design-Build-Operate engagements for water utilities (e.g., 8-year Thames Water framework valued up to £5m, NI Water £1.2bn Major Project Partnering Framework via TES-CAW JV, multiple Irish Water frameworks). Go-to-market is sales-led and direct-to-enterprise/government, with named customers including leading hyperscale data centre operators, a major global technology provider under a 4-year global supply agreement, and major UK and Ireland water utilities. The company participates in consortium arrangements (FaCT3, eight2O Alliance) to access larger contract opportunities. Following a November 2024 minority investment from Foresight Group (£25m), TES was acquired by French electrical equipment company Legrand in April 2026 in a deal likely exceeding £100m, delivering a 4x return to Foresight and positioning TES for its next phase of international growth under Legrand ownership.

Name

TES Group

Legal name

TES Group

Website

https://tesgroup.com

Company type

Private

Founded year

1998

Operating status

Acquired

Headcount range

51–100 employees

Short description

TES Group is a Northern Ireland-based engineering firm operating two divisions: TES Power, which manufactures LV switchgear and Modular Electrical Rooms for global hyperscale data centres, and TES Water, which delivers MEICA services to UK and Ireland water utilities. Founded 1998, acquired by Legrand in April 2026.

Ownership category

akta.pro rank

Product category

Industrial Power Distribution and Water Treatment Engineering

NAICS

Switchgear and Switchboard Apparatus Manufacturing (335313), Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Relay and Industrial Control Manufacturing (335314), Electric Power Generation, Transmission and Distribution (2211)

SIC

Switchgear & Switchboard Apparatus (3613), Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Low-Voltage Switchboards & Panelboards (LV distribution panels, MCCs, switchboards) (IMAGAEAA)

akta.pro secondary industries

Switchgear & Switchboards (HV/MV/LV, GIS/AIS) (IMAGAAAB), Circuit Breakers, Disconnectors, Earthing Switches & Switchgear Components (EUADACAH)

Keywords

• Low voltage switchgear
• Modular electrical rooms
• Water treatment MEICA services
• Data centre power distribution
• Motor control centres

Headquarters

HQ city

Cookstown

HQ country

United Kingdom

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Power Distribution Equipment Manufacturing: Design, manufacture, and distribution of low voltage power distribution equipment including LV Switchgear, Power Distribution Units (PDUs), Modular Electrical Rooms, Busduct Systems, and ATS systems primarily for data centres. Revenue is project-based with multi-million euro contracts for design, supply, installation, testing and commissioning.
2. Water/Wastewater MEICA Services: MEICA (Mechanical, Electrical, Instrumentation, Control and Automation) services for UK and Ireland water utilities including design, build, operation, installation, commissioning, and maintenance of water and wastewater treatment systems. Revenue comes from framework contracts and project-based work.
3. Design, Build and Operate (DBO): Complete project lifecycle services from initial design concept through construction to operation, providing clients with an all-encompassing solution covering process design, mechanical/electrical design, project management, civil works, and operational support.

Pricing tiers

Go-to-market motion3 records

Distribution channels3 records

Marketing channels5 records

Core offering

TES Group designs, manufactures and commissions low-voltage power distribution equipment (LV switchgear, PDUs, Modular Electrical Rooms in POD/Skid configurations, Busduct Systems and UL891 switchboards) for global hyperscale and colocation data centres through its TES Power division. Through its TES Water division, the company delivers MEICA (Mechanical, Electrical, Instrumentation, Control and Automation) engineering services including ECI, Design Build and Operate (DBO), Process Design and Motor Control Centres for municipal water and wastewater treatment utilities across the UK and Ireland.

Product overview

TES Group operates two main divisions: TES Power and TES Water. TES Power specializes in the design and manufacture of power distribution solutions for global data centres, offering Data Centre Power Distribution equipment, Modular Electrical Rooms (POD & Skid configurations), UL891 PowerPro Range switchboards, Busduct Systems, and Support & Maintenance services. TES Water provides MEICA services (Mechanical, Electrical, Instrumentation, Control and Automation) for municipal water and wastewater treatment, including ECI Projects, Design Build and Operate (DBO) services, Process Design, Motor Control Centres, and Support & Maintenance. Both divisions leverage in-house manufacturing capabilities and advanced BIM technology for project delivery.

Differentiator

Problem solved

Functional benefit

Products and services

• Data Centre Power Distribution Equipment Wide range of low-voltage power distribution equipment — including LV switchgear, Power Distribution Units (PDUs) and Remote Power Panels — designed, manufactured and distributed by TES for global hyperscale and colocation data centre operators. Products carry IEC and UL dual-standard certification enabling supply into US, UK and EU markets from a single Northern Ireland manufacturing hub.
• Modular Electrical Rooms (POD & Skid) Factory-built modular electrical rooms for hyperscale and colocation data centres, available in POD and Skid configurations and engineered for rapid off-site deployment. TES operates manufacturing capacity for 60+ concurrent modular builds and a 6-8 month lead time, supplying ultra-efficient carbon-neutral data centre projects across Europe.
• UL891 PowerPro Range Switchboards, PDUs and Remote Power Panels UL-listed PowerPro range of Switchboards, Power Distribution Units (PDUs) and Remote Power Panels manufactured by TES for data centre applications, complementing the IEC-standard switchgear line and supporting US market delivery.
• Busduct Systems Busduct power distribution systems designed and manufactured for data centre and critical infrastructure applications.
• Power Support & Maintenance Ongoing support and maintenance services for TES Power's installed base of power distribution equipment, covering switchgear, PDUs, Busduct Systems and Modular Electrical Rooms in data centre environments.
• Water and Wastewater Process Design In-house process design service for water and wastewater treatment schemes, providing bespoke engineering solutions across municipal water utilities and wastewater treatment projects.
• Design Build and Operate (DBO) Complete Design, Build and Operate (DBO) project delivery for water and wastewater treatment facilities, covering process design, mechanical and electrical design, project management, civil works, installation, commissioning and operational support under a single point of accountability.
• ECI (Early Contractor Involvement) Projects Early Contractor Involvement (ECI) project delivery for water and wastewater treatment infrastructure, enabling collaborative design input and delivery optimisation during project inception — used on schemes such as Kinnegar WwTW and Sydenham WwPS upgrades for NI Water.
• Motor Control Centres (MCC) In-house designed and manufactured Motor Control Centres for water and wastewater treatment applications, supporting pumping, aeration, dosing and process control functions across municipal treatment works.
• Water Support & Maintenance Ongoing support and maintenance services for installed water and wastewater treatment systems, complementing TES Water's MEICA, ECI and DBO project delivery with long-term operational support for utility clients.
• Remote Factory Acceptance Testing (Remote FAT) Remote Factory Acceptance Testing service using head-mounted camera live streaming via video conferencing platforms (Microsoft Teams, Google Meet, Zoom), allowing clients to participate in FAT sessions for TES power distribution equipment from any remote location.

Quantifiable outcome

• 20% on-site time savings across projects through BIM 360 implementation
• +4 more outcomes

Named customers10 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

Feature5 records

Partnerships

Seven partnerships are on record, tiered core, significant, strategic and major.

• FaCT3 Consortium (Farrans Construction, Celtic Anglian Water, TES)coreStrategic or Co-development Partner · 1 November 2020Celtic Anglian Water, Farrans & TES formed the FaCT3 consortium for major Irish Water projects. The consortium secured the first of four major upgrade contracts at Ringsend Wastewater Treatment Plant and was reappointed as Framework Partner through Irish Water's 21/027 Multi Supplier Framework.
• Zulal Water TechnologysignificantChannel Partner/ Reseller/ Distributor · 1 July 2013Partnership with Libya-registered Zulal Water Technology to provide medium to large scale wastewater treatment solutions to the Libyan market. Partnership began following a trade mission to Tripoli in 2013 and continues with ongoing project deliveries.
• TES-CAW JVcoreStrategic or Co-development PartnerJoint venture between TES and Celtic Anglian Water (CAW) selected as Partner to NI Water to support delivery of its £1.2bn Capital Investment Programme through the Major Project Partnering Framework (MPPF).
• Anglian WatercoreStrategic or Co-development PartnerTES selected as part of Anglian Water's new MCC and Controls framework for controls and automation solutions, working collaboratively with other MCC manufacturers Paktronic and CEMA.
• eight2O Alliance (Thames Water)coreStrategic or Co-development PartnerTES works as part of eight2O, the largest alliance in the water sector tasked with delivering £1.75bn of capital investment work during AMP6 period for Thames Water.
• AutodeskstrategicTechnology or IntegrationTES utilises Autodesk Construction Cloud (BIM 360) as its Common Data Environment for project collaboration, 3D modelling, clash detection, and document management across water and power division projects.
• LegrandmajorOthersFrench electrical equipment company Legrand acquired TES Group in April 2026, delivering a 4x return to investor Foresight Group. The acquisition positions TES for its next phase of international growth under Legrand's ownership.

Scale indicators10 records

Recent moves7 records

Expansion highlights7 records

Broad incumbents

• Siemens: Global industrial and electrical equipment major with significant switchgear and data center infrastructure offerings. Competes in LV switchgear with TES but operates at much greater scale across many verticals.
• ABB: Global electrical equipment incumbent offering comprehensive LV/MV switchgear, substations and data center power solutions across all geographies. A direct competitor in switchgear but with a much broader industrial portfolio beyond TES's focus areas.

Direct peers

• MWH Treatment: Leading UK water industry MEICA contractor delivering design, build and operation of water and wastewater treatment assets. Directly comparable to TES Water's UK water utility framework model and ECI project delivery approach.
• Mott MacDonald Bentley: Joint venture delivering MEICA services and water/wastewater infrastructure to UK water utilities (Severn Trent, United Utilities, Anglian Water). Closely comparable to TES Water's framework-based water utility delivery model.
• Eaton: Major US-headquartered power management company with a dedicated data center vertical offering switchgear, PDUs, busways and modular power solutions. Competes head-to-head with TES in LV switchgear for hyperscale data center deployments.
• Barhale: UK infrastructure contractor with significant water and wastewater utilities presence, including framework agreements with Thames Water and other major utilities. Directly comparable to TES Water's UK utility framework and ECI delivery approach.
• Schneider Electric: Global electrical equipment major with a large data center power distribution business (LV/MV switchgear, PDUs, busways). Directly competes with TES Power for hyperscale data center customers and offers comparable IEC/UL-certified products at greater scale.
• Vertiv: Data center critical infrastructure specialist offering switchgear, PDUs, UPS and modular power solutions. Directly comparable to TES Power's hyperscale data center customer focus and modular electrical room approach.
• Morrison Water Services: UK water utility contractor providing MEICA, infrastructure and maintenance services to major water companies. Comparable business model to TES Water serving Thames Water, Severn Trent and similar UK utility customers.
• Celtic Anglian Water (CAW): Joint venture partner with TES in the TES-CAW JV serving NI Water's £1.2bn MPPF, and member of the FaCT3 consortium with TES for Irish Water projects. Directly comparable water utility delivery model and JV partner.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• Xx.com/tesgroupltd

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Subsidiaries4 records

Funding overview

Funding rounds1 record

Investors1 record

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 TES Group