Explore practical approaches for building a security-minded engineering culture in this 50-minute conference talk from AWS re:Inforce 2025. Discover how AWS has successfully implemented cultural elements and mechanisms that enable proactive security through real-world examples and case studies. Learn strategies for developing engineering teams that instinctively identify security issues and investigate potential impacts before they become problems. Gain actionable insights into transforming your engineering practices to naturally prioritize security considerations throughout the development lifecycle. Understand the key components needed to scale a security-first mindset across your organization and create sustainable cultural change that makes security an integral part of your team's DNA rather than an afterthought.