Principal Sustainability Consultant - Building Physics

A well-established, leading multidisciplinary building services and sustainability consultancy are looking to appoint a Principal Sustainability Consultant - Building Physics to join their London team. This is a senior technical role within a respected practice delivering integrated MEP, sustainability and environmental design services across commercial, residential, education and mixed-use developments.

The practice delivers technically complex projects across high-end residential, commercial office, mixed-use, education and refurbishment schemes, with a strong presence in the London market. Many of their developments involve tight urban sites, ambitious energy targets and detailed façade and services coordination, requiring rigorous building performance input from early concept through to delivery.

As Principal Consultant, you will take a lead role in delivering building physics and performance analysis across a varied project portfolio. You will provide strategic input at early design stages, guide project teams on passive and low-carbon solutions, and ensure robust modelling informs design decisions.

This is a hands on technical leadership role, combining detailed simulation work with client engagement and team oversight.

• Lead dynamic thermal modelling, energy modelling, overheating analysis and carbon assessments.
• Deliver Part L compliance modelling and support planning energy strategies.
• Advise on passive design, façade performance, fabric optimisation and operational energy reduction.
• Present technical outputs clearly to clients, architects and design teams.
• Manage project workstreams, ensuring quality and commercial control.
• Provide mentorship and technical guidance to junior consultants.
• Contribute to the development of internal modelling standards and best practice.

• Degree qualified in Building Physics, Environmental Design, Engineering or a related discipline.
• Experience in building performance or sustainability consultancy.
• Strong proficiency in dynamic simulation tools such as IES VE, DesignBuilder or equivalent.
• In depth knowledge of UK Building Regulations (including Part L) and overheating guidance (TM52/TM59).
• Experience preparing planning energy statements and sustainability reports.
• Confident communicator, comfortable leading technical discussions with clients and stakeholders.
• Experience overseeing or mentoring junior team members.

The role offers a highly competitive salary package, reflective of principal level responsibility, alongside a comprehensive benefits package and sits within a growing sustainability function where progression is clearly defined.

If you're interested in finding out more, reach out to Ethan Williams on or click apply to find out more.

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