Senior​/Principal Mechanical Design Engineer

Senior to Principal Mechanical Design Engineer

Location:

Oxford | Sectors:
Low Carbon, Heritage, Education, Healthcare

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.

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.

• 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.

• 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.