John McCullough

Sustainability Engineer

John is a sustainability professional with a background in building services design, energy performance and sustainable certification. With over 15 years of experience delivering environmental assessments, he specialises in BREEAM and Fitwel certification across a wide range of sectors and building types.

He draws on his technical understanding of design and construction to help project teams develop practical, achievable sustainability strategies. He takes a balanced approach to certification, securing accessible credits while ensuring more challenging themes are addressed where they add real value.