Specialists in the EPC design and construction of
high voltage ( 3.3 kV – 420 kV) grid connections.

Our Services

Harnessing our global experience with local expertise, from concept design, planning, through to project execution and beyond, H&MV is a brand you can trust to power your business wherever you require. 

Data Centres

Across Ireland, the United Kingdom, Europe and Africa, H&MV are actively engaged in mission critical, hyperscale data centre projects.  We have expertise in GIS & AIS substation and grid route construction.

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Our extensive project portfolio is a testament to our market leading positioning as an EPC contractor.  H&MV expert crews are involved in wind farm, solar & battery storage development around the world.   Our service offerings from concept design, planning, delivery & energisation provide our clients with confidence, knowing they are working with a brand they can trust.


H&MV are a leader in the utility sector with a proven track record of providing turnkey solutions to TSO and DNO clients. 

Our dedicated design teams, project management, installation and commissioning staff have vast experience in the design and build of substations up to 400 kV. 

We turn concepts into realities, with our high voltage expertise and experience providing clients with assurance they can rely on. 

EV Chargers

H&MV provide turnkey solutions for Electric Vehicle Charging Points.  We’re available to assist owners, developers and facilities managers to make a choice that specifically meets their needs.  Committed to successfully delivering on time, adhering to deadlines, we are at hand to deploy our crews to busy urban areas and ensure minimal invasion and intrusion. 

Contact our local team for more information.

& Design

At H&MV Engineering our design engineering team are at the forefront in pioneer engineering solutions.
Our portfolio of services includes and is not limited to:

Feasibility Studies & Planning

Tailored to client specific needs, from cost assessment, site and equipment analysis, our detailed inspection and evaluation will assist clients in reaching an informed decision.

With our technical expertise, we can confidently assess the condition of your HV network requirements.

We can develop and deliver studies with solid content on environmental impact, grid connection methodology, sizing and different configuration arrangements.

Site Investigation

Site investigations and surveys will include high level detail on:

  • underground cable routes,
  • planning permissions,
  • substation evaluations,
  • hydrographic and topographic surveys

and more.

Design & Specification

We provide detailed design of substations from our extensive history of engineering solution delivery over the years in T&D systems.

HV cabling, SCADA Systems, earthing, bonding, substation layouts, 3D Modelling all benefit from our expertise that we offer in design solutions to the client.

Studies & Planning

Our Engineers are collaboratively working together to provide solutions and develop the array of services we deliver.

Our library of services is extensive:

  • load forecasting models,
  • network master plans,
  • transient stability studies,
  • load flow,
  • contingency analysis,
  • single and three phase short circuit studies
  • dynamic and transient stability studies,
  • insulation co-ordination studies,
  • voltage regulation,
  • reactive compensation,
  • 3D Modelling,
  • development of network planning and security standards.

Civil Design

Our design hub offers clients complete Civil Design solutions for substation and grid route design.

We have inhouse BIM and AutoCad experts ready to populate civil work packages/drawings in line with planning requirements.

State of the Art Test Equipment
  • Omicron CMC 356 x 3
  • Omicron CPC 100 and all accessories x 2
  • Omicron FRA
  • Omicron DIRANAHV testing equipment
  • Programma Sverker 650 x 5
  • Programma Primary injection kit 600A x 5
  • Programma Battery discharge kit
  • Programma Circuit breaker timing kit
  • Programma low ohm tester 200A
  • Megger 10kV Insulation resistance tester 10kV
  • Megger 5kV Insulation resistance tester x 15
  • Fluke dry well calibrator
  • Fluke mA simulators x 2
  • Buchholz test tool
  • AC pressure tester 72kV
    And much more


H&MV Engineering has established itself as a leader in turnkey Engineering, Procurement and Construction of Energy solution Projects (EPC).


Our Engineering Team is comprised of highly qualified, industry experienced professionals who utilise leading edge software and design.

Our engineering capabilities enable H&MV to provide innovative solutions to our clients worldwide.


Our dedicated team of Procurement Professionals operate with complete transparency in full recognition of regulations, legal compliance and client requirements. H&MV conducts its business with the highest levels of integrity.

Our extensive vendor database ensures that H&MV Engineering remains highly competitive in our global market. Our procurement team cater for each and every project requirement, whether it’s an off the shelf item or a highly specialised /engineered piece of equipment.

Our professionals provide guidance on equipment selection/evaluation, vendor auditing, FAT tests, bulk material supply, services, consumables, construction components, to name but a few.


At the core of H&MV Engineering is our dedication to safety, depicted by our Zero Accidents Culture.

With a project portfolio extending across green and brown field EPC HV projects worldwide, H&MV Engineering is renowned for its commitment to delivering projects on time, safely and in line with budgets.

Our construction crews have worked on projects in extreme weather conditions from the deserts of the Middle East to the sub-zero temperatures and artic conditions in the Nordic Region.

With employees who greet each new challenge with enthusiasm, the key to our success is our flexibility and adaptability.

HV Projects Case studies

Asset Management

Why do you need High Voltage Asset Management?

In most cases your HV Equipment and Systems are critical to your plants reliability because there is often no redundancy and the systems can be the single point of failure for your facility.

In order to maintain the equipment in a safe, reliable and functional state, regular predictive and preventive maintenance is required.

HV Maintenance can be divided into two categories – Non Intrusive and Intrusive:

Non Intrusive or predictive maintenance should be carried out while your plant is live and equipment is fully loaded and up to operational temperature.

Intrusive or preventive maintenance is carried out while the equipment is shutdown, isolated and locked out.

HV Non Intrusive Maintenance includes:

• Partial Discharge Testing – PD

• Equipment Visual Inspection

• Voltage, Amps & Temperature Readings

• Infrared Thermographic Imaging – TI

• Oil Sample Analysis

• Power Quality analysis

HV Intrusive Maintenance Includes:

• HV & LV Switchgear Inspection & Testing

• SF6 Switchgear gas handling equipment and leak detection, disposal and recycling

• Transformer Inspection & Testing

• Transformer Condition Assessment

• Tap Changer Maintenance

• Busbar Inspection

• Cable Termination Inspection

• Cable VLF & Partial Discharge

• Protection Relay Inspection & Testing

Asset Management Case studies

Asset Management
Case studies

Training Academies