Jenkins supports DevSecOps by integrating security checks directly into CI/CD pipelines, enabling automated execution of tools like SAST, DAST, dependency scanning, and container security testing throughout the software development lifecycle. This allows security to be embedded into every stage of development rather than being treated as a separate phase, helping teams identify vulnerabilities early and reduce risks before deployment. Its flexibility and wide range of plugins make it easy to connect with various security tools and enforce continuous security practices. In my opinion, the most important contribution of Jenkins is its plugin ecosystem for security tools, because it provides the adaptability needed to integrate different security solutions into pipelines, making DevSecOps workflows more customizable, scalable, and effective.