Senior Windows Infrastructure Engineer (L3)

CORNERSTONE GLOBAL PARTNERS PTE. LTD.; Singapore; On-site; SGD 67,000 - 100,000; Full time

Job summary

Cornerstone Global Partners Pte. Ltd. is seeking an L3 support professional to manage enterprise Windows infrastructure, VMware, Nutanix, and Active Directory, within a 24x7 managed services environment.

You will handle AD/Entra ID operations, governance, RBAC, and hybrid identity tasks, alongside automation via Ansible, Terraform, PowerShell, and Python. The role includes incident, problem, and change management, DR planning, and security/compliance audits.

Qualifications

• Experience administering Windows Server 2016/2019/2022 and related AD services.
• Strong knowledge of Active Directory, DNS, DHCP, and GPO management.
• Hands-on VMware ESXi/vCenter administration with high availability.
• Nutanix Prism/AHV administrations and lifecycle management.
• Experience with SCCM, BigFix; monitoring with Datadog/Grafana.
• Scripting and automation: Ansible, Terraform, PowerShell, Python.
• ITIL Foundation and security/compliance awareness.

Responsibilities

• Provide 24x7 L3 support for Windows infrastructure and identity services.
• Handle incident, problem, and change management; RCA and KEDB.
• Perform patching, vulnerability remediation, and DR activities.
• Maintain lifecycle, EOL/EOS tracking and capacity planning.
• Coordinate OEM activities and document SOPs/runbooks.

Skills

Incident management

Problem solving

Change management

SLA adherence

Communication

Education

Microsoft Windows Server Hybrid Administrator

Microsoft Identity and Access Administrator

VMware VCP/VCAP

Nutanix NCP

Red Hat Ansible Automation

Hashicorp Terraform Associate

ITIL Foundation

Tools

Windows Server admin

Active Directory

VMware vSphere

Nutanix Prism/AHV

SCCM

BigFix

Datadog

Grafana

AD Manager Plus

QuestRecovery Manager

Ansible

Terraform

PowerShell

Python scripting

Workflow automation

Job description

Provide L3 support for enterprise Windows infrastructure, VMware, Nutanix, Active Directory and Hybrid Identity services in a 24x7 managed services environment.

Support Coverage

• 24x7 operational support, shift rotation,on-call support, major incident management, SLA compliance and DR activities.

Technical Requirements

• Windows Server 2016/2019/2022Administration
• Active Directory, DNS, DHCP,DFS, GPO, ADFS, KMS, RDS
• VMware ESXi, vCenter, HA, DRS,vMotion
• Nutanix Prism, AHV, CVM, LCM
• SCCM, BigFix, Datadog, Grafana
• AD Manager Plus and QuestRecovery Manager

AD and Entra ID Responsibilities

• Azure AD / Entra ID Operations
• Conditional AccessAdministration
• Identity Governance
• RBAC Administration
• Access Certification Reviews
• Entra Connect Management
• AD Recovery using QuestRecovery Manager
• AD Manager Plus Administration
• Security and Compliance Audits
• Hybrid Identity Management
• Certificate LifecycleManagement

Automation Skills

• Ansible Automation Platform
• Terraform Infrastructure asCode
• PowerShell Automation
• Python Scripting
• Workflow Automation
• Reusable Playbooks and IaCModules

Operational Responsibilities

• Incident, Problem and ChangeManagement
• RCA and KEDB Management
• Patching and VulnerabilityRemediation
• Lifecycle Management andEOL/EOS Tracking
• Capacity and PerformanceManagement
• DR Planning and Execution
• OEM Coordination
• Documentation, SOP and RunbookMaintenance

Preferred Certifications

• Microsoft Windows Server HybridAdministrator
• Microsoft Identity and AccessAdministrator
• VMware VCP/VCAP
• Nutanix NCP
• Red Hat Ansible Automation
• Hashicorp Terraform Associate
• ITIL Foundation
  

Due to an anticipated high volume of applicants, we regret that only shortlisted candidates will be notified. The information provided is for recruitment purposes only.

Cornerstone Global Partners (EA License Number: 19C9859) is an affirmative equal-opportunity employer and recruitment firm. We evaluate qualified applicants without regard to race, colour, religion, creed, gender, sexual orientation, gender identity, marital status, national origin, age, veteran status, disability, or any other protected class.