Building Physics Engineer

Building Physics Engineer / Sustainability Consultant Location: Bristol Job Type: Permanent, Full-Time Salary: £30,000 - £45,000 (depending on experience) Start Date: Immediate Working Pattern: Hybrid (office + remote) Summary Building Physics Engineer / Sustainability Consultant required to join an established Building Physics & Building Performance Engineering team within a UK-based multidisciplinary engineering and sustainability consultancy with multiple offices nationwide. This role focuses on building performance modelling, operational energy analysis, and sustainable design, supporting low-energy, low-carbon developments across multiple sectors. The successful candidate will contribute to dynamic simulation modelling, overheating analysis, daylight assessments, and Net Zero Carbon strategies, working closely with architects, MEP engineers, and design teams from early-stage concept through to detailed design and delivery. Key focus areas include IES modelling, Part L / Part O compliance, TM52 / TM59 assessments, BREEAM support, and operational energy modelling (TM54 / NABERS UK). Key Responsibilities Deliver dynamic thermal modelling (IES VE) to assess building energy performance, overheating risk, and operational efficiency Complete building compliance and performance assessments, including: Building Regulations Part L and Part O CIBSE TM52, TM59 (overheating) and TM54 (operational energy) EPC calculations and NABERS UK Passive House (where applicable) Undertake daylight and sunlight analysis using climate-based modelling tools Support BREEAM certification through performance modelling and credit delivery Contribute to Net Zero Carbon and energy strategies, aligned with UKGBC, LETI, RIBA 2030 and planning requirements Act as a technical point of contact, coordinating with architects, MEP engineers, and wider design teams Produce clear technical reports, models, and presentations for clients and stakeholders Support planning submissions, client meetings, and design workshops Manage and prioritise workload across multiple concurrent projects Contribute to internal process improvement, including tools, workflows, and best practice Collaborate with BIM teams to support coordinated project delivery NABERS UK Passive House (where applicable) Requirements Degree in a relevant discipline (e.g. Building Services Engineering, Mechanical Engineering, Environmental Engineering, Physics) 2-4 years’ experience in building physics or sustainability consultancy Strong capability in IES VE and dynamic simulation modelling Solid understanding of: Building Regulations Part L and Part O CIBSE TM52, TM59, TM54 BREEAM and NABERS UK UK Net Zero Carbon frameworks Experience in operational energy modelling and HVAC system analysis Previous involvement in planning application support and design-stage modelling Strong written and verbal communication skills, with the ability to present technical information clearly Ability to work both independently and within multidisciplinary teams Desirable: Rhino Python or scripting experience Revit or AutoCAD Chartered status (or working towards) with CIBSE, IMechE, or equivalent Must have the right to work in the UK (no sponsorship available) Benefits 24 days annual leave + bank holidays Flexible working (flex time + flex days) Hybrid working model Enhanced pension scheme Private healthcare insurance Employee Assistance Programme Death in service insurance Option to purchase up to 10 additional days leave Additional leave day before August bank holiday Cycle to Work scheme Electric car scheme Long service rewards: 5 years: £500 voucher 10 years: £1,000 voucher 15 years: £1,500 voucher Birthday leave (after 3 years’ service) Enhanced parental leave policies Ongoing training and professional development support Equal Opportunities Applications are assessed based on skills, qualifications, and experience relevant to the role. Adjustments can be provided throughout the recruitment process where required