Lead Mechanical Engineer

Join us, be part of more.

We’re so much more than an energy company. We’re a family of brands revolutionising how we power the planet. We're energisers. One team of 21,000 colleagues that's energising a greener, fairer future by creating an energy system that doesn’t rely on fossil fuels, whilst living our powerful commitment to igniting positive change in our communities. Here, you can find more purpose, more passion, and more potential.

That’s why working here is #MoreThanACareer. We do energy differently - we do it all. We make it, store it, move it, sell it, and mend it.

At Centrica Business Solutions, we’re proud to partner with over 7,000 organisations globally – helping them to balance planet, with profit. We build, operate and maintain onsite, large‑scale energy assets like Solar PV and Combined Heat and Power – to help businesses to save the planet and save money. We’re also transforming the UK’s energy landscape by partnering with landowners and developers to build a 900MW portfolio of new grid‑scale solar farms and battery storage assets.

Centrica Business Solutions (CBS) designs, builds, operates, and maintains clean energy assets that enable customers to decarbonise their operations. Our end‑to‑end offering includes the supply of green energy, project delivery expertise, financing solutions, and industry‑leading operational capabilities. Together, we help customers improve energy efficiency, reduce carbon emissions, and balance commercial performance with sustainability goals.

This is an exciting opportunity to play a leading role in the delivery of low‑carbon mechanical building services solutions
. You will contribute to the development of sustainable, zero‑carbon, innovative, and high‑quality mechanical designs, supporting our customers’ transition to cleaner energy systems.

The successful candidate will be confident working directly with clients and possess a strong track record in the design and delivery of mechanical building services installations. You will be responsible for both the detailed design and the successful integration of low‑carbon technologies, as well as providing technical oversight during installation.

• Produce high‑quality mechanical engineering documentation, including specifications, schedules, and technical reports
• Carry out pipework sizing calculations for systems including LTHW, CHW, HWS, CWS, steam, gas, flues, compressed air, and specialist systems
• Perform ductwork sizing calculations
• Size mechanical plant and equipment, including pumps, plate heat exchangers, boilers, CHP units, heat pumps, thermal stores, buffer vessels, calorifiers, fans, AHUs, and chillers
• Undertake heat gain and heat loss calculations
• Develop heating and cooling load profiles
• Carry out thermal modelling and system performance analysis
• Produce BMS system descriptions and control strategies
• Participate in HAZOP and LOPA studies
• Conduct DSEAR assessments
• Complete PED calculations and prepare associated compliance documentation

You will be an experienced mechanical designer, currently working within building services design or a closely related discipline. You will hold a degree in Mechanical Engineering
, Building Services Engineering
, or a relevant equivalent qualification.

You will be a confident and effective communicator, capable of working both independently and collaboratively within multidisciplinary teams. You will demonstrate a proactive and innovative mindset, with a continuous focus on improving design quality, safety, and delivery outcomes. A professional, safety‑first approach is essential, along with pride in delivering work to a high standard through to completion.

• An Engineering Council – accredited honours degree (CIBSE, IET, or IMechE), or an HNC in a relevant discipline with a commitment to further professional development
• Working towards, or already achieved, IEng or CEng professional registration
• A forward‑thinking approach with a passion for design innovation
• Experience across a range of engineering activities, ideally including:
  • Site surveys and inspections
  • Solution development
  • Building…