Developed a comprehensive Security Self-Assessment Documentation for the K3s project within the cncf/toc repository, focusing on enhancing security governance and audit readiness. The work involved creating detailed Markdown documentation that outlines security practices, compliance mapping, and assessment procedures, providing a clear framework for future audits and external reviews. Leveraging skills in documentation, project management, and security assessment, the developer established a reusable pattern for security governance that can be adopted across other CNCF TOC projects. This contribution streamlines compliance alignment and reduces the effort required for subsequent assessments, supporting more efficient governance and facilitating faster, more transparent security reviews.