In this crucial 20-minute Fireside Chat, we are joined by Iris van der Harst, Chief Procurement Officer at Equans (a major energy and facilities services provider). Iris shares Equans' leading practices in supplier-led decarbonisation, outlining what the agenda means to her personally and how it shapes her vision for procurement. The conversation traces Equans' journey, from its first key steps to tackling the challenge of 95% of its carbon emissions being Scope 3, and what that means for supplier engagement. Iris delves into the practicalities of building trust and alignment with suppliers on shared sustainability goals, addressing the biggest challenges faced and how to ensure meaningful, rather than tick-box, training is provided. She discusses the most important KPIs and data points used to track supplier contributions, highlights standout innovations from the supply base, and explores how to foster an internal culture where procurement teams are empowered to prioritise sustainability alongside traditional cost and performance metrics. Finally, Iris offers essential advice to other CPOs beginning this journey and provides a forecast for the future of supplier collaboration in sustainability.