Senior to Principal Mechanical Design Engineer | Oxford | Low Carbon Projects, Heritage Refurbishments, Progression Opportunity
A well-established, independent building services consultancy in Oxford is looking to strengthen their mechanical team with an experienced Senior or Principal Mechanical Engineer.
Known for delivering technically robust, sustainable solutions across heritage, education, healthcare, and infrastructure projects, this team combines mechanical, electrical, lighting, Passivhaus, and building physics expertise under one roof. With a strong pipeline of work and ongoing investment in their people, this is a great opportunity to step into a high-impact role with long-term progression potential.
🛠️ Role Overview:
Lead or support mechanical design from RIBA Stage 2 through to handover, including detailed HVAC, hot and cold-water systems, and sustainable design strategies
Collaborate with clients, architects, and internal teams to develop low-energy, technically sound solutions across new-builds and complex refurbishments
Apply building performance analysis and building physics principles where relevant, working closely with in-house specialists
Oversee or contribute to technical documentation, drawings (AutoCAD, Revit), and specifications
Attend site visits, manage design coordination, and provide support throughout the construction phase
Mentor junior engineers and take an active role in internal knowledge sharing
At Principal level, contribute to fee proposals, resourcing, and client development
✅ What You’ll Bring:
Degree-qualified in Mechanical Engineering or Building Services (or similar)
6+ years of experience in a consultancy environment delivering mechanical design
Experience working on projects in sectors like education, commercial, healthcare, or heritage
Excellent technical understanding of HVAC systems, regulations, and energy-efficient design
Familiarity with Revit, AutoCAD, IES or Hevacomp (or similar design tools)
Strong communication and coordination skills
Chartership (CEng MCIBSE) or working towards it is desirable
💼 What’s on Offer:
Competitive salary based on experience, typically between ÂŁ55,000 and ÂŁ70,000 for this level
A broad project portfolio with real design variety, including listed buildings and modern low-energy campuses
Flexible/hybrid working, 25+ days holiday, private healthcare, cycle to work scheme, CPD support, and more
A collaborative, technically strong team with a great culture and low staff turnover
Structured progression path to Associate and beyond, with support toward chartership and leadership development
If you’re a Senior or Principal Mechanical Engineer looking for meaningful, sustainability-focused work with room to grow, this is an opportunity well worth exploring