Principal Mechanical Design Engineer

Job Description

Principal Mechanical Design Engineer

Low-Carbon MEP | Heat Networks | Offsite Delivery

Birmingham / Solihull

️ Offsite MEP | Decarbonisation | Energy Centres | District Heating

Build the future of low-carbon building services

Are you the kind of Mechanical Design Engineer who gets excited by complex plantrooms, heat pumps, energy centres and design that actually gets built?

This is not a “design in isolation” role.

You’ll be joining a specialist offsite MEP and low-carbon building services business delivering major decarbonisation, modular plantroom, district heating and commercial MEP projects across the UK and beyond.

You’ll take the lead on mechanical design from early-stage concept through detailed design, fabrication support, installation interface and commissioning input.

What you’ll be working on

Heat pumps, ASHP, WSHP and low-carbon heating systems

Energy centres, packaged plantrooms and modular MEP solutions

LTHW, DHW, pump sets, thermal stores, calorifiers and heat exchangers

BIM-led coordination, DFMA and offsite fabrication

Public and private sector projects across healthcare, education, commercial estates, data centres and district heating

What we’re looking for

You’ll likely be a Principal Mechanical Design Engineer or a strong Senior Mechanical Design Engineer ready for a bigger technical leadership role.

You’ll bring:

✅ Strong mechanical building services design experience

✅ Heat pump, district heating, energy centre or decarbonisation exposure

✅ Confidence producing and reviewing calculations, schematics, specifications and plant selections

✅ Understanding of BMS/control strategies and commissioning interfaces

✅ Ability to mentor junior engineers and support technical quality

✅ A practical mindset around buildability, fabrication and site delivery

Why this role is different

This is a chance to work inside a business that combines design, manufacture and delivery.

Your work will not disappear into a report. It will become real plantrooms, real heat networks and real low-carbon infrastructure.

If you want a role where mechanical design meets practical engineering, offsite delivery and decarbonisation impact, this is one to look at.

Interested? Apply now!