Christian Mergenthaler enhanced Kubernetes infrastructure by upgrading VictoriaMetrics Custom Resource Definitions in the IFTTT/CRDs-catalog repository, aligning them with version 0.58.0 to support new features and ensure a reliable upgrade path. He also improved the Cilium Helm Chart in derailed/cilium, focusing on stability and maintainability by standardizing label application across roles, services, and Spire components. His work emphasized clean YAML structure and consistent resource labeling, which increased deployment reliability and upgrade safety. Christian applied his expertise in Helm, CRDs, and Kubernetes, demonstrating careful attention to manifest readability and upgrade traceability throughout both projects.