Role-Based Access Control (RBAC) is a critical component for secure and scalable platform design in cloud infrastructure, effectively managing access by assigning roles instead of individual permissions. When applied across multiple cloud providers like AWS, GCP, and Azure, as well as within Kubernetes clusters, RBAC ensures engineers receive only the necessary access, maintaining security without hindering productivity. In Kubernetes, RBAC operates at both the cloud provider level and within the cluster through IAM policies, ClusterRoles, and ClusterRoleBindings. CockroachDB Cloud implements a robust RBAC strategy by granting engineers read-only credentials and using just-in-time (JIT) access for temporary admin needs, leveraging tools like the Lumos autonomous identity platform. This approach maintains operational safety while allowing developers and SREs to efficiently manage workloads across AKS, EKS, and GKE. The key to successful RBAC lies in aligning cloud IAM roles with Kubernetes access and establishing workflows for temporary privilege elevation, ensuring a consistent and secure framework across different cloud environments.