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. 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 Configure server OS, roles, features, and baseline security hardening Server Virtualisation & Hypervisor Platforms Manage VMware vSphere/ESXi, Microsoft Hyper-V, and/or Nutanix Build clusters, virtual switches, datastores, and high-availability features Provision, template, and migrate VMs across hosts/clusters/platforms (incl. P2V/V2V) Integrate virtualisation platforms with shared storage and backup solutions Troubleshoot and optimise hypervisor and VM performance 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) Configure M365 security & compliance (Defender for Office 365, Purview, Conditional Access) 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 Configure management groups, subscriptions, policies, RBAC, and tagging Deploy monitoring/alerting via Azure Monitor, Log Analytics, and Microsoft Sentinel Execute cloud migrations (Azure Migrate, rehosting, re-platforming) Implement hybrid connectivity (ExpressRoute, Site-to-Site VPN, Azure Arc) 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 Team Contribution Share knowledge and contribute to the technical capability of the team Mentor junior engineers on build and deployment activities 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 Data centre experience — racking, cabling, hardware commissioning Tertiary qualification in Computer Science, Information Technology, or a related field 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 Hands-on engineer who takes pride in high-quality build, deployment, and documentation work Clear, confident communicator — comfortable with both technical and non-technical stakeholders Self-starter who manages competing priorities effectively Strong team player who shares knowledge and mentors others Acts with integrity and takes ownership of outcomes