Heather O’Reilly-Duff is Head of Operations at Watt Footprint, an Irish energy technology company transforming how businesses understand and reduce their energy costs. She leads cross-functional delivery across software, energy expertise and client engagement, building operational systems that allow the company to scale quickly while delivering measurable savings for clients.

Her leadership style is rooted in clarity, resilience and growth. A former Captain in the Royal Engineers, she brings a disciplined yet people-focused approach to scaling teams, empowering individuals to excel through structure and ownership. She is passionate about turning energy data into real commercial outcomes — ensuring insights don’t just sit on dashboards, but drive smarter decisions, reduced waste and stronger margins across multi-site businesses.