Operate and improve Linux server lifecycle: build, harden, patch, upgrade, decommission. Lead incident/problem management for Linux: RCA, prevention plans, runbooks. Manage identity and access integration (LDAP/AD, SSSD, PAM, sudo policy). Design and implement AWS architectures: VPC, subnets, routing, NAT/IGW, endpoints, Transit Gateway. Implement secure IAM: roles/policies, least privilege, permission boundaries, SCPs (AWS Organizations). Support migrations to AWS and hybrid connectivity (VPN, Direct Connect fundamentals). Automation: Ansible (playbooks, inventories, roles, troubleshooting). Nice To have: OpenShift/Kubernetes operations, container security. EKS deep experience (cluster ops, IRSA, ingress, autoscaling). Tanzu