Principal Sustainability Consultant

Job Title: Principal Consultant – Energy & Building Simulation

Location: Primary location in Cardiff (Bristol location considered for the right candidate)

Work Type: Full-time, Hybrid

Salary: Competitive, dependent on experience (+ benefits)

We are seeking an experienced and ambitious Principal Energy & Building Simulation Consultant to join our expanding team in the Southwest and South Wales region.

This role is a key strategic priority for our team. The successful candidate will act as a technical authority on energy compliance and dynamic thermal modelling, driving net-zero strategies across a diverse portfolio of commercial, residential, and public sector projects. While the primary base for this role is Cardiff, we are also open to applicants based in Bristol.

• Technical Leadership & Operational Modelling: Lead advanced dynamic thermal simulation using IES VE to evaluate energy performance, operational energy consumption, and thermal comfort.

• Building Regulations & Compliance: Oversee compliance testing and verification across Part L (Conservation of fuel and power) and Part O (Overheating) of the Building Regulations.

• Thermal Comfort & Overheating Assessments: Deliver advanced thermal comfort assessments, including TM59 (residential overheating) and TM54 (evaluating operational energy use at design stage).

• Project Management & Client Liaison: Manage client relationships, present technical energy strategies to design teams, architects, and developers, and ensure timely project delivery.

• Mentorship & Quality Assurance: Mentor junior and mid-level consultants, review IES models, and uphold strict technical standards across all deliverables.

• Net Zero Strategies: Advise clients on decarbonisation pathways, net-zero carbon operational strategies, and sustainable building performance optimization.

• Extensive hands-on experience using IES Virtual Environment (IES VE) for dynamic thermal simulation.

• In-depth technical knowledge of Part L, Part O, TM54, and TM59 regulatory standards and methodologies.

• Proven track record in a consultancy environment with strong project leadership capabilities.

• Strong knowledge of building services, thermal performance, and HVAC systems.

• Excellent communication skills, both written and client-facing.

• Relevant energy accreditation (e.g., Low Carbon Energy Assessor - LCEA, NDEA Level 4/5, OCDEA).

• CEng status or working towards Chartered status with a relevant body (CIBSE, Energy Institute, etc.).

• Experience with NABERS UK or Passivhaus standards.

• Flexible hybrid working model balancing office and home working.

• Opportunity to lead high-profile sustainability initiatives across Wales and the Southwest.

• Clear pathway for career advancement to Director level.

• Competitive benefits package including healthcare, generous pension, and professional subscription support.