This keynote offers a candid look at a five-year journey to embed sustainability into procurement, with a sharp focus on supplier engagement across Scope 3 decarbonisation and decent work. It explores how expectations were set, partnerships were built, and data and accountability were strengthened to drive progress beyond tier-one suppliers. Reflecting on what worked—and what didn’t—the session shares practical lessons on incentivising action, overcoming capability gaps, and balancing ambition with commercial reality. Looking ahead, it outlines what’s next for sustainable procurement: scaling impact, deepening collaboration, and using procurement as a lever for both climate action and social value across global value chains.