Senior Windows Infra Engineer — 24x7 Hybrid Identity

cornerstone global partners pte. ltd.; Singapore; On-site; SGD 60,000 - 90,000; Full time

Job summary

Cornerstone Global Partners is seeking an L3 support engineer to maintain and optimize enterprise Windows infrastructure, Active Directory, VMware, and Nutanix in a 24x7 managed services environment. You will participate in on-call rotation, incident response, and DR activities to ensure service levels.

The role requires strong experience with Windows Server administration, VMware ESXi/vCenter, and Entra ID operations, plus automation using PowerShell and Python.

Qualifications

• Experience in 24x7 enterprise IT support and incident management.
• Knowledge of AD and Entra ID operations is required.
• Familiarity with backup and disaster recovery processes.

Responsibilities

• Incident, problem and change management.
• RCA and KEDB management.
• Patching and vulnerability remediation.
• Lifecycle management and EOL/EOS tracking.
• Capacity and performance management.
• DR planning and execution.

Skills

Windows Server Administration

Active Directory Administration

VMware ESXi & vCenter

Nutanix Prism & AHV

Tools

SCCM

BigFix

Datadog

Grafana

AD Manager Plus

Quest Recovery Manager

PowerShell

Python

Terraform

Ansible

Job description

Cornerstone Global Partners is seeking an L3 support engineer to maintain and optimize enterprise Windows infrastructure, Active Directory, VMware, and Nutanix in a 24x7 managed services environment. You will participate in on-call rotation, incident response, and DR activities to ensure service levels.

The role requires strong experience with Windows Server administration, VMware ESXi/vCenter, and Entra ID operations, plus automation using PowerShell and Python.