PLEASE MENTION GREENJOBS WHEN RESPONDING TO THIS CAREER OPPORTUNITY We are working with a well-established, multidisciplinary consultancy to appoint a Principal Sustainability Consultant to join their growing sustainability team in Cardiff. This is a senior, client-facing role offering the opportunity to lead complex projects across the built environment and play a key role in shaping sustainability strategy and delivery. The Role This is a varied and influential position suited to an experienced sustainability professional who enjoys combining technical leadership with project and team management. The successful candidate will take ownership of sustainability delivery on medium to large-scale projects across all RIBA stages, while also supporting wider team development. Key responsibilities include: Acting as Sustainability Discipline Project Lead on medium to large projects, including supporting outline and detailed planning submissions Leading sustainability workstreams on major projects, supporting senior leadership on delivery Developing and coordinating project programmes and resource plans Leading client and design team workshops, clearly communicating technical and strategic sustainability advice Delegating, managing, and reviewing technical work produced by junior team members Delivering and overseeing a range of technical sustainability assessments, including: Energy performance modelling (Part L, Part O, thermal comfort, operational energy) BREEAM and other envir