As platform engineering continues to gain traction, ensuring the security of the platform is becoming increasingly critical. This panel will delve into the complexities of securing modern platforms, from the vulnerabilities inherent in the supply chain to the threats that emerge at runtime. Our expert panelists will share their insights on the latest security challenges, best practices, and strategies for protecting the platform, its components, and its users. The discussion will cover key topics such as securing dependencies, managing vulnerabilities, implementing robust access controls, and monitoring runtime threats. By exploring the intersection of platform engineering and security, this panel aims to provide a comprehensive understanding of the measures needed to safeguard the platform and ensure the trust and reliability of the services it delivers.