Mechanical · Electrical · Renewables
Engineering for projects with no margin for error.
From satellite test chambers to occupied housing estates, we design, install and commission the building services that critical facilities depend on, for clients including the NHS, Airbus, the UK Space Agency and KP Snacks.
Trusted on projects for
- NHS
- Home Office
- Airbus
- UK Space Agency
- KP Snacks
- Skoda
- Smith & Nephew
- Eon
- RHS
What MER means
Three disciplines.
One accountable team.
We started as M&E contractors. As renewables became central to how buildings are powered, we built that expertise in-house. Now one team takes responsibility for every service, from the switchboard to the solar array.
Mechanical
Heating, ventilation, plumbing and process services, designed around how a building is actually used.
- HVAC and comfort cooling
- Ventilation and extract, including ATEX-rated systems
- Central heating and gas boilers
- Plumbing, hot water and sanitaryware
Electrical
From LV switchboards and isolated supplies for clean rooms to full rewires across occupied housing estates.
- LV distribution, switchboards and sub-mains
- Lighting and DALI lighting control
- Emergency lighting and fire detection
- Data, fibre and UPS systems
Renewables
Solar PV, battery storage and EV charging, connected properly to the systems that are already there.
- Commercial and domestic solar PV
- Tesla Powerwall battery storage
- EV charge points (OZEV approved)
- DNO applications and grid connection
Swipe to explore →
Featured project
Powering the UK's National Satellite Test Facility
Three years providing power and data to the clean rooms, test chambers and science areas of a £116m facility that recreates the conditions of space.
- Client
- STFC RAL Space
- Principal
- Mace
- Our scope
- Power and data to science and clean-room areas
- Programme
- Oct 2020 – Nov 2023
How we work
From first conversation to final certificate.
Choose a single stage or the full turnkey package. Either way, one team stays accountable from consultation through design, fit-out and commissioning.
Consultation
Every project starts with a conversation about the problem, not the product.
Design
Mechanical, electrical and renewable designs that work hard, look right and pass audit.
Fit-Out
Installation is what turns a good building into a space that works.
Commissioning
Handover happens when everything is proven, not before.
Sectors
Expertise where it's hardest to get right.
Cleanrooms, hospital departments, live food lines, occupied homes and overseas plants. The more niche the brief, the more value we add.
Renewable Energy
Solar PV, battery storage and EV charging for homes and businesses.
02
Pharmaceuticals
Controlled environments built to strict industry regulation.
03
Healthcare
Operating theatres, wards, dental practices and emergency services.
04
International
UK standards, delivered anywhere in the world.
05
Food Production
Hygienic, efficient installations that keep lines running.
06
Commercial
Offices, retail, hospitality and showrooms, nationwide.
07
Industrial
Plant, process and maintenance with downtime kept to a minimum.
08
Residential
Social housing programmes, landlords and private homes.
Selected projects
Work that speaks for itself.
From Mongolia's first metal powder plant to more than 400 occupied homes in Salford, here's a selection from 22 case studies.
01 / 08National Satellite Test Facility
Powering the £116m facility that recreates the conditions of space to test the UK's next generation of satellites.
02 / 08Steppe Metal Powder Plant
Mongolia's first high-tech metal powder plant: hired for the design, then trusted to deliver the whole project.
03 / 08Adaptimmune Therapeutics
A complete electrical package for a bespoke cell-therapy manufacturing facility, including Grade B cleanrooms.
04 / 08Plastics Direct & Northern Signcases
A 120-panel solar PV system, plus the new 1,800m² roof it needed first.
05 / 08Mars Rover Test Facility
Lighting, power and data for the viewing gallery and STEM centre beside Airbus's recreated Martian surface.
06 / 08Queen Elizabeth Hospital Mortuary
A full MEP refurbishment of a hospital mortuary, delivered with care, in and out of hours.
07 / 08Energy-from-Waste Plant
A full M&E installation for a gasification plant supplying dependable power to Bombardier.
08 / 08Beechfarm Estate
Rewires and kitchen and bathroom upgrades for more than 400 occupied homes, in under nine months.
22 case studiesView all projectsClient view
“We had expected our assignment to be a particularly tough design brief for any contractor, but Thomas Halliwell rose to the challenge and exceeded all of our expectations. Their attention to detail has been outstanding.”
Accreditations
Accredited, audited and approved.
Our engineers are NICEIC and Gas Safe qualified and work to every relevant British Standard. Our environmental management is certified to ISO 14001.
- NICEICApproved Contractor
- Gas SafeRegistered
- ECARegistered Member
- MCSCertified Installer
- OZEVApproved Installer
- RECCConsumer Code Member
- ISO 14001UKAS 1300-EMS-001
- Tesla PowerwallCertified Installer
- Solar Energy UKMember
- CHASAccredited Contractor
- SafeContractorApproved
- ConstructionlineRegistered
- AcclaimAccredited
- AvettaMember
Careers
Engineers who like a hard problem.
We're always looking for exceptional people across mechanical, electrical and renewables. We're currently hiring an Approved Electrician in Speke, Liverpool.
Start a project
Have a project with no margin for error?
Tell us what you're planning. We'll come back within one working day with the right engineer for the job.