System Administrator (L1/L2/L3)

About the role

We are looking for an experienced System Administrator to act as the internal escalation point for complex incidents across Windows Server, virtualization, networking and SDN platforms. You will own escalated tickets, mentor junior engineers and drive continuous improvement.

Key responsibilities

• Serve as the escalation point for Windows Server, virtualization, infrastructure networking and SDN (VXLAN) incidents.
• Perform root‑cause analysis on recurring or high‑impact issues and lead problem‑management resolution.
• Own escalated tickets through to closure while maintaining clear communication with customers and internal teams.
• Liaise with Microsoft and third‑party vendors on support cases.
• Mentor Level 1 and Level 2 engineers and contribute to knowledge‑base articles and runbooks.
• Identify risks, single points of failure and improvement opportunities.
• Drive workflow automation and continuous‑improvement initiatives.

Required profile

• Hands‑on experience designing, deploying and supporting clustered Windows Server environments (2016‑2025) with Hyper‑V as the primary hypervisor.
• Proven third‑line troubleshooting, log analysis and structured root‑cause investigation.
• Excellent written and verbal communication skills, able to explain technical issues to both technical and non‑technical audiences.
• Eligibility to work in Singapore (citizen, permanent resident or valid work pass).

Required skills

• Windows Server (2016‑2025), Active Directory, Group Policy, DNS, DHCP, Certificate Services, Failover Clustering, Hyper‑V.
• Microsoft SDN stack – VXLAN, vNETs, micro‑segmentation via VMM and PowerShell.
• SAN and Fibre Channel storage integration with Windows clustering.
• System Center components: VMM, SCCM/MECM, SCOM, DPM.
• VMware vSphere/ESXi, vCenter; Citrix Hypervisor/Xen (including XCP‑ng); Linux KVM and general Linux server administration.
• Scripting/automation: PowerShell, Chef, Puppet.
• ITIL‑aligned service management processes.