Senior to Principal Mechanical Design Engineer

Location:

Oxford |

Sectors:

Low Carbon, Heritage, Education, HealthcareAbout 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 schemeVaried project portfolio:

listed buildings, modern low-energy campuses, sustainability-led projectsSupport for professional growth:

chartership, leadership development, career progression to Associate and beyondCollaborative team culture

with low staff turnoverIf 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.

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