The elements of a net-zero energy system comprises the interconnected technologies, policies and infrastructure needed for a sustainable, secure and affordable supply of energy. Cambridge’s research into systems engineering facilitates the physical, digital and market integration of zero-carbon innovations across the whole energy system, by combining deep understanding of technology, economics and regulatory policy, informed by cutting-edge modelling and evidence-based analysis. Examples include Cambridge’s research into power electronics, digital and data technologies (AI@Cam), tackling emissions from the industrial sector (Advanced Nanotube Application and Manufacturing Initiative, Cambridge Centre for Smart Infrastructure and Construction, road transport (Centre for Sustainable Road Freight), aviation (Whittle Lab), the built environment (Centre for Advanced Research and Education in Singapore, Energy Efficient Cities), economics of markets and system design (Energy Policy Research Group), and research into financial instruments and the pricing of energy (Cambridge Centre for Environment, Energy and Natural Resource Governance). This whole-systems approach to energy and sustainability allows integrated collaborations with innovators, industry, government and regulators to deliver solutions for a sustainable society.