Matthew Graham is Principal of Graham Energy and an award-winning Sustainable Building Specialist with deep expertise in the Nationwide House Energy Rating Scheme (NatHERS). A highly experienced accredited Assessor, Teacher and Mentor, Matthew works across all major NatHERS simulation tools: AccuRate Sustainability, BERS Pro, FirstRate5 and Hero, bringing both breadth and precision to every engagement. He holds an official role as a Hero Support Partner and contributes to the industry's technical direction as a member of the NatHERS Technical Advisory Committee (TAC), helping shape the standards and guidance that assessors rely on nationwide. Matthew's point of difference lies in his rare combination of architectural background and solid working knowledge of the underlying Chenath simulation engine, the computational core that drives NatHERS assessments. This gives him the ability to bridge theory and practice in ways that genuinely move the needle for clients and fellow assessors alike. His work is driven by a single goal: empowering the profession through education, mentorship, and meaningful technical support.