IES was founded 20 years ago and is headquartered in Glasgow. It is recognized as a world leader in 3D performance analysis software that is used to design tens of thousands of energy efficient buildings across the globe. IES’ technology is supported by integrated consulting services and today its capabilities are expanding from use on individual buildings to helping create sustainable cities. Our technology and consulting services uncover hidden cost, energy and carbon savings that support smarter energy-efficient choices across new building investments, building operation and refurbishment of existing buildings. We invest over ¼ of our turnover in R&D to ensure our analytical tools and industry knowledge stays the most pioneering and innovative.