Principal Sustainability Consultant

Principal Sustainability Consultant (Energy Focus) – Cardiff or Bristol

A human-centric, planet-conscious engineering consultancy delivering intelligent and sustainable solutions to the built environment is looking to appoint a Principal Sustainability Consultant with an energy focus, to join their Sustainability team and South West Business Unit. The role can be based from either the Cardiff or Bristol office.

This is a rare opportunity to join an industry-leading sustainability discipline, known for its dynamic, innovative approach to sustainable design, construction, and building operation - offering the chance to grow not just your own career, but the industry's approach to the field as a whole.

The Role:

Acting as Discipline Project Lead for medium to large scale projects across all RIBA stages, including delivery of documents supporting outline and detailed planning submissions
Acting as Workstream Lead, taking ownership of delivery and supporting senior team members on large scale projects
Developing and coordinating resource and project plans, leading client and design team workshops, and communicating clearly and concisely
Undertaking and supporting detailed analyses including energy compliance calculations (Building Regulations Part L, EPCs), advanced building performance modelling (overheating/thermal comfort, operational energy assessment), energy strategies in support of planning, and Net Zero carbon assessments
Supporting technical excellence communities and the mentoring/training of junior team members
Potential involvement in wider workstreams such as whole life carbon and environmental assessmentWhat's Required:

Experience within sustainability consultancy, with a focus on energy and building performance
Advanced simulation capabilities, including Building Regulations Part L assessments (Elmhurst, IES), EPCs, Part O assessments, thermal comfort, and operational energy assessment (CIBSE TM54, ApacheSIM, ApacheHVAC)
Demonstrable experience in project leadership and resource planning
Experience training or mentoring junior team members
A track record delivering successful planning applications and collaborating with local authorities (local and London market experience advantageous)
Qualified and recognised in industry, preferably working towards or holding Chartered status
Strong communication skills and confidence leading energy workshops with design teams
Experience working with clients, contractors, and architects in a design-oriented consultancy roleAdvantageous:

NABERS UK Design for Performance experience
Parametric building/energy performance analysis (e.g. Rhino)
Passivhaus (PHPP) experience
Experience developing fee proposals
Line management experienceWhat's on Offer:

Competitive salary and extensive benefits package, including private medical cover, an electric vehicle salary sacrifice scheme, and stock options
Up to 30 days annual leave, plus a 9-day fortnight scheme
Structured Career Paths Framework, professional and technical development schemes, and thriving community groups
The opportunity to work on award-winning, industry-leading sustainable design projectsThis role would suit an experienced sustainability consultant looking to take the next step with a firm at the forefront of sustainable design.

To find out more or to apply, please get in touch with Callum Jones at