Senior Windows Server Admin — HA Clustering & Automation

Quantum Management Services Ltd.; Toronto; On-site; CAD 90,000 - 110,000; Full time

Job summary

Quantum Management Services Ltd. is seeking an experienced Systems Administrator III to support and maintain mission-critical Windows Server infrastructure across on-premises and hybrid cloud environments.

The role is hands-on, server-focused, with responsibilities including SCCM patching, platform upgrades, high-availability clustering, production troubleshooting, and infrastructure automation. Collaboration with Infrastructure, Engineering, Security and SQL teams is key.

Qualifications

• 3+ years of hands-on Windows Server administration in an enterprise environment.
• Strong experience with SCCM patching and server lifecycle management.
• Proficient in Active Directory, DNS and Group Policy administration.
• Experience supporting multi-node Windows clusters and SQL Server HA.
• PowerShell scripting and infrastructure automation capability.

Responsibilities

• Build, deploy, patch, upgrade and manage enterprise Windows Server environments.
• Administer Active Directory, DNS and Group Policy.
• Perform hands-on SCCM server patching and lifecycle management.
• Drive platform currency, patching and in-place server upgrades.
• Support and troubleshoot multi-node Microsoft Windows clusters.
• Support SQL Server high availability environments and work closely with SQL DBAs.
• Resolve complex production incidents through advanced troubleshooting and root cause analysis.
• Develop PowerShell automation to improve infrastructure operations.
• Maintain runbooks, documentation and operational standards.
• Collaborate with Infrastructure, Engineering, Application, Security and DBA teams.
• Support ongoing infrastructure modernization and lifecycle initiatives.

Skills

Windows Server

SCCM patching

Active Directory

DNS

Group Policy

PowerShell

Troubleshooting

HA clustering

Automation

SQL Server HA

Job description

Quantum Management Services Ltd. is seeking an experienced Systems Administrator III to support and maintain mission-critical Windows Server infrastructure across on-premises and hybrid cloud environments.

The role is hands-on, server-focused, with responsibilities including SCCM patching, platform upgrades, high-availability clustering, production troubleshooting, and infrastructure automation. Collaboration with Infrastructure, Engineering, Security and SQL teams is key.