William Ray is an accomplished professional in energy and sustainability, currently serving as the Director of Energy & ESG at UPP since October 2025. Previously, William worked as the Head of Sustainability at CLS Holdings plc from January 2022 to September 2025, where strategic delivery of the company's ESG agenda was essential in establishing it as a leader in sustainable office real estate. William has also held significant roles at Clarion Housing Group, Enhabit Limited, ROCKWOOL Group, the Carbon Trust, British Antarctic Survey, Sinclair Knight Merz, and Sustainable Energy Authority, demonstrating a robust expertise in developing sustainability strategies, energy efficiency technologies, and innovative low carbon solutions. William holds a BA/BE (Hons) in Energy Engineering and History from the University of Melbourne.
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