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 fa ade and services coordination, requiring rigorous building performance input from early concept through to delivery. The RoleAs 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. Key ResponsibilitiesLead dynamic thermal modelling, energy modelling, overheating analysis and carbon assessments.Deliver Part L compliance modelling and support planning energy strategies.Advise on passive design, fa ade performance, fabric ..... full job details .....