Senior to Principal Mechanical Design Engineer
Location: Oxford | Sectors: Low Carbon, Heritage, Education, Healthcare
About the Company
Join a well-established, independent building services consultancy in Oxford, known for delivering sustainable, technically robust solutions across heritage refurbishments, modern low-energy campuses, and complex infrastructure projects. Our integrated team combines mechanical, electrical, lighting, Passivhaus, and building physics expertise under one roof.
With a strong pipeline of work and investment in people, this role offers long-term progression and a chance to shape meaningful projects.
The Role
As a Senior or Principal Mechanical Engineer, you will:
Lead mechanical design from RIBA Stage 2 to handover: HVAC, hot/cold water, and sustainable strategies.
Collaborate with clients, architects, and internal teams to create energy-efficient, technically sound solutions.
Apply building physics and performance analysis where relevant.
Oversee technical documentation, drawings (AutoCAD/Revit), and specifications.
Attend site visits, manage design coordination, and support construction.
Mentor junior engineers and contribute to knowledge sharing.
At Principal level: influence fee proposals, resourcing, and client development.
What We’re Looking For
Degree-qualified in Mechanical Engineering or Building Services.
6+ years of consultancy experience delivering mechanical design.
Experience across education, commercial, healthcare, or heritage projects.
Strong understanding of HVAC systems, regulations, and energy-efficient design.
Proficiency in Revit, AutoCAD, IES, Hevacomp, or similar.
Excellent communication and coordination skills.
Chartered (CEng/MCIBSE) or working toward chartership preferred.
What We Offer
Competitive salary: £55,000–£70,000 (DOE)
Flexible/hybrid working, 25+ days holiday, private healthcare, cycle-to-work scheme
Varied project portfolio: listed buildings, modern low-energy campuses, sustainability-led projects
Support for professional growth: chartership, leadership development, career progression to Associate and beyond
Collaborative team culture with low staff turnover
If you’re a Senior or Principal Mechanical Engineer looking to work on sustainable, heritage-focused projects with career progression, this is your chance to make a tangible impact