Senior System Engineer - windows

Role Overview
We're hiring a hands-on Senior System Engineer - windows to manage hybrid cloud and on-premises infrastructure for an Australian managed services provider. You'll bring strong practical expertise across Windows Server infrastructure, virtualisation/hypervisor platforms, server & storage hardware, Microsoft Azure, and Microsoft 365 — delivering well-engineered, repeatable outcomes for enterprise clients.

This is a hybrid role based in Sri Lanka, supporting an Australian client environment.

Key Responsibilities

Infrastructure Support & Management

• Manage Windows Server environments — AD, DNS, DHCP, Group Policy, certificate services
• Configure on-premises storage (SAN/NAS/DAS) and connect hosts to storage fabrics
• Perform infrastructure upgrades, patching, firmware updates, and hardware refresh

Virtualisation & Hypervisor Platforms

• Manage VMware vSphere/ESXi, Microsoft Hyper-V, and/or Nutanix platforms
• Build clusters, virtual switches, datastores, and high-availability features
• Provision and migrate VMs across hosts/clusters/platforms (incl. P2V/V2V)

Microsoft 365 Management

• Manage M365 tenants — Exchange Online, SharePoint Online, Teams, OneDrive
• Implement identity/access via Entra ID, including hybrid identity (AD Connect/Cloud Sync)
• Execute M365 migrations and provide post-migration support

Cloud (Azure) Management

• Manage Azure Landing Zones and resources (Bicep, Terraform, ARM, or Portal) per CAF guidance
• Maintain Azure networking — VNets, NSGs, Azure Firewall, Private Endpoints
• Deploy monitoring/alerting via Azure Monitor, Log Analytics, and Microsoft Sentinel
• Execute cloud migrations (Azure Migrate, rehosting, re-platforming)

Automation & Documentation

• Maintain PowerShell automation/scripting to support repeatable delivery
• Build and reuse infrastructure-as-code templates
• Produce accurate as-built documentation and knowledge transfer material

Experience & Skills Required

• 5+ years' hands-on experience building, deploying, and migrating IT infrastructure across on-premises and cloud environments
• Deep expertise in Windows Server (2016/2019/2022) — AD DS, DNS, DHCP, Group Policy, server roles
• Demonstrated experience deploying Azure Landing Zones and resources aligned to CAF/WAF
• Hands-on Microsoft 365 deployment/migration experience (Exchange Online, Teams, SharePoint, Entra ID)
• Experience with hybrid identity (Entra Cloud Sync / Azure AD Connect)
• Azure networking, security, and governance experience (NSG, Firewall, Policy, RBAC)
• Strong PowerShell scripting/automation skills
• Exposure to infrastructure-as-code tooling (Bicep, Terraform, or ARM)

Desirable

• Hands-on experience with a hypervisor platform — VMware vSphere/ESXi, Hyper-V, or Nutanix
• Experience with enterprise server hardware (Dell EMC, HPE, Lenovo, Cisco UCS)
• Experience with storage hardware/platforms (SAN, NAS, iSCSI/Fibre Channel)
• Experience with backup, replication, and disaster recovery technologies

Certifications (Highly Regarded)

• Microsoft Certified: Azure Administrator Associate (AZ-104)
• Microsoft Certified: Azure Solutions Architect Expert (AZ-305)
• Microsoft 365 Certified: Enterprise Administrator Expert
• Microsoft Certified: Identity and Access Administrator Associate (SC-300)
• Microsoft Certified: Security Operations Analyst Associate (SC-200)
• VMware VCP-DCV or Nutanix Certified Professional (NCP)

What We're Looking For

• Strong technical problem solver with excellent attention to detail
• Clear communicator, comfortable with both technical and non-technical stakeholders
• Self-starter who manages competing priorities effectively
• Takes ownership and pride in high-quality build, deployment, and documentation work
• Proactive knowledge-sharer who enjoys mentoring and team collaboration