Lead hands-on infrastructure support in Toronto, specializing in virtualization, Microsoft 365, Azure, and networking across client environments.

This Senior Systems Administrator role supports a managed IT services provider serving clients across the Greater Toronto Area. You will troubleshoot complex infrastructure issues, work directly with clients, and own technical problems through resolution. The position requires experience with Nutanix HCI, Microsoft 365, Azure, Entra ID, and network infrastructure.

Key Responsibilities:
Manage and troubleshoot Nutanix HCI virtualized infrastructure
Administer Exchange Online, SharePoint, Teams, and OneDrive
Support Azure, Entra ID, and hybrid identity environments
Configure LAN/WAN, VLANs, firewalls, VPNs,



and Wi-Fi
Lead infrastructure migrations, upgrades, and implementations

Requirements:
Five-plus years in systems administration or infrastructure engineering
Managed services or multi-client workplace experience
Hands-on Nutanix HCI cluster and AHV administration
Solid Microsoft 365 administration experience
Client-facing communication and complex troubleshooting skills

Apply your Nutanix, Microsoft 365, Azure, and networking expertise as a senior Toronto infrastructure administrator.
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📌 Senior Systems Administrator Toronto
🏢 STACK IT Recruitment
📍 Toronto