Data centres are the backbone of modern digital infrastructure, housing critical applications and data for organisations worldwide. However, they are also incredibly energy-intensive, consuming approximately 1-2% of the global electricity supply. As data demands increase with the proliferation of cloud services, big data, and AI, this percentage is expected to grow, posing significant challenges and opportunities for energy management. Jason Koffler and a data centre client will share details of how they have worked together to improve the energy efficiency of its data centres.