Senior Infra Engineer

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• Operate, maintain, and troubleshoot enterprise server infrastructure across DC/DR, HQ and branches, including Windows Server, Linux Server, physical servers, virtual machines and core infrastructure services.
• Administer Microsoft Active Directory, DNS, DHCP, Group Policy, user/group management, file server, shared folders, NTFS permissions, DFS and related identity/access services.
• Manage virtualization platforms such as VMware ESXi/vCenter and Hyper-V, including VM provisioning, resource monitoring, datastore, snapshot, vMotion, HA/DRS and troubleshooting activities.
• Operate storage and backup systems, including SAN/NAS, Veeam/NetBackup or equivalent platforms, backup policy monitoring, restore testing and backup evidence collection.
• Monitor infrastructure health using Zabbix/Grafana or equivalent tools; respond to alerts related to system performance, storage capacity, backup status, service availability and security events.
• Implement OS patching, vulnerability remediation, server hardening and periodic health checks for Windows, Linux and infrastructure platforms.
• Support Microsoft 365 and hybrid infrastructure operations including MFA, Exchange Online, SharePoint, OneDrive, Teams and related security settings where assigned.
• Coordinate with Network, Security, DBA, Application teams and vendors for incident response, root cause analysis, change implementation and project delivery.
• Prepare and maintain system documentation, inventory, CMDB, SOPs, runbooks, change plans, rollback plans and audit evidence.
• Participate in infrastructure modernization projects such as AD/File Server refresh, virtualization restructuring, backup improvement, monitoring enhancement and DR/BCP readiness.
• Perform other ad-hoc tasks as assigned by the line manager.