72 months of experience administering enterprise virtualization or hypervisor platforms, such as VMware vSphere and ESXi, Microsoft Hyper-V, Proxmox VE, Nutanix AHV, or Red Hat OpenShift Virtualization, including host configuration, virtual machine provisioning, storage and network assignment, and resource management. Implement and validate high-availability configurations (clustering, failover, replication, backup/restore testing), write and maintain automation and configuration management scripts, and execute change requests within approved change windows.