Senior Windows Infrastructure Engineer (L3)

AVATAR MODERN TECHNO SERVICES PTE. LTD.; Singapore; On-site; SGD 70,000 - 110,000; Full time

Job summary

AVATAR MODERN TECHNO SERVICES PTE. LTD. is seeking an L3 infrastructure support engineer to manage enterprise Windows, VMware and Nutanix environments within a 24x7 managed services setup. The role emphasizes Active Directory, Azure Entra ID operations and strong automation skills.

You will handle incident and change management, perform RCA/KEDB tasks, and participate in DR planning, patching, and compliance audits across hybrid identity services.

Qualifications

• L3 support for Windows, VMware, Nutanix and Active Directory in a 24x7 managed services environment.

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.
• OEM coordination.
• Documentation, SOP and Runbook maintenance.

Skills

Windows server administration

Active Directory management

Incident & problem management

SLA compliance

Tools

VMware ESXi/vCenter

Nutanix Prism/AHV/CVM

SCCM/BigFix

Datadog

Grafana

AD Manager Plus

Quest Recovery Manager

PowerShell

Terraform

Job description

Position Summary

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 Quest Recovery 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 Lifecycle Management

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 Runbook Maintenance

Preferred Certifications

Microsoft Windows Server HybridAdministrator

Microsoft Identity and AccessAdministrator

VMware VCP/VCAP

Nutanix NCP

Red Hat Ansible Automation

Hashicorp Terraform Associate

ITIL Foundation