Mechanical Design Engineer jobs in United Kingdom

We’re looking for a Building Services Design Engineer to join a well‑established, full‑service design and build contractor specialising in Mechanical, Electrical, and Public Health engineering. The company is based in Cirencester and offers an end‑to‑end service — from initial concept and design, through procurement and installation, to testing, commissioning, and long‑term maintenance — with a strong emphasis on low‑carbon and renewable energy solutions.

Joining this business means working for a firm with a proven national footprint — its project experience spans sectors such as commercial, industrial, hospitality, education, and residential. Unlike smaller consultancies, you’ll have the chance to be involved in real, large‑scale projects, from feasibility right through to commissioning, while contributing to sustainable, low‑carbon engineering innovation. The leadership team is seasoned: the Design Director is a Chartered building services engineer and Low Carbon Energy Assessor, with two decades of experience. Meanwhile, the firm is committed to staff development, offering both academic training and hands‑on mentoring. There’s a strong company culture of care — both for quality of delivery and the environment. Their environmental policy reflects a commitment to energy efficiency, sustainability, and minimising waste.

• Lead the design of HVAC and other building services systems, from concept through to delivery — including surveying, detailed design, commissioning, and site inspections
• Take real ownership of projects (with support from the Project Director), integrating into a multi‑disciplinary team
• Work across a variety of sectors: commercial, retail, industrial, and residential
• Collaborate with other MEP disciplines, ensuring design is coordinated and aligned with sustainability goals
• Participate in design team meetings, coordinate with clients, and represent the technical team externally
• Apply your knowledge of building regulations, particularly Part L, to deliver low‑carbon, compliant systems
• Use design software to produce working and as‑built drawings, performance specifications, and energy calculations (e.g., AutoCAD, Revit, Hevacomp, OpenBuildings or similar)
• Produce and present energy analyses, lifecycle costing, and sustainability assessments
• Help grow the business, bringing in new ideas and ambition for development and innovation

• Chartered engineer, or qualified to HND / HNC level in Building Services Engineering, with post‑qualification experience in UK construction
• Strong track record designing HVAC or related systems for real‑world buildings
• Confident working in a “design and build” environment, with an understanding of the full project cycle
• Solid grasp of other disciplines (MEP) and sustainability frameworks like BREEAM
• Excellent communicator, with strong interpersonal and influencing skills — able to engage clients and internal teams
• Competent in Microsoft Office (Word, Excel) and design tools (AutoCAD, preferably Revit)
• Familiar with low‑carbon engineering and building regulations (especially Part L)
• Proactive, ambitious, and driven — you’re looking for a role where you can make a long‑term impact and grow with the company

• A supportive, growth‑oriented working environment: the company really invests in its people
• Meaningful, sustainable work: projects often include renewable and low‑carbon systems
• Exposure to a wide variety of sectors, giving you a diverse and challenging portfolio
• The opportunity to grow professionally and influence both technical and commercial strategy
• Based in Cirencester — a historic, vibrant Cotswold town, offering a strong quality of life and good connectivity