Senior System Administrator

A leading enterprise organization is looking for an experienced Systems Administrator III to play a key role in maintaining and evolving a large-scale Microsoft infrastructure that supports critical business services. You'll be responsible for ensuring the reliability, security, and performance of Windows-based platforms while contributing to ongoing infrastructure modernization, automation, and operational improvements. Working across virtualized, hybrid, and highly available environments, you'll partner with technical teams to deliver resilient infrastructure solutions and streamline day-to-day operations. This is an excellent opportunity for a seasoned infrastructure professional who enjoys solving complex technical challenges and driving continuous improvement within a mature enterprise environment. Required Skills & Experience 5+ years of experience administering enterprise Windows Server infrastructure, including Active Directory, DNS, Group Policy, and core Microsoft technologies in production environments. Strong experience managing VMware virtual infrastructure, Windows server lifecycle management, system patching, and PowerShell-based automation. Demonstrated experience supporting highly available enterprise platforms, troubleshooting complex infrastructure issues, and maintaining secure, reliable production systems. Desired Skills & Experience Experience supporting Microsoft Azure or other hybrid cloud infrastructure. Familiarity with configuration management and infrastructure-as-code tools such as Ansible. Knowledge of enterprise security standards, compliance frameworks, and infrastructure automation best practices. Daily Responsibilities Hands-On Engineering: 70% Team Collaboration & Cross-Functional Work: 30% You Will Receive The Following Benefits Medical, Dental, and Vision Insurance Vacation Time Current Vacancy: Yes Use of AI in Hiring: No Applicants must be currently authorized to work in Canada on a full-time basis now and in the future. Accommodation will be provided in all parts of the hiring process as required under Motion Recruitment’s Employment Accommodation policy. Applicants need to make their needs known in advance. Posted By: Adrian Cronk

The role involves hands-on engineering to maintain and evolve a large-scale Microsoft infrastructure and ensure the reliability and security of Windows-based platforms. You will also collaborate with cross-functional teams to deliver resilient infrastructure solutions and drive continuous operational improvements.

Candidates must have over 5 years of experience administering enterprise Windows Server environments, including Active Directory and VMware. Proficiency in PowerShell-based automation and supporting highly available production systems is required.

• Medical Insurance • Dental Insurance • Vision Insurance • Vacation Time

Identified from the job description. Confirm important requirements above.

• Windows Server Administration
• Active Directory
• DNS
• Group Policy
• VMware
• PowerShell
• Automation
• Microsoft Azure
• Hybrid Cloud
• Ansible
• Infrastructure as Code
• System Patching
• Troubleshooting
• Infrastructure Modernization
• Security Standards
• Compliance Frameworks

• Technology
• Software

Minimum experience

5+ years

Apply by

Aug 19, 2026

Posting language

English

Working hours

40 hours per week

Seniority

Mid-Senior level

Application method

Direct apply is available