Job DescriptionJob Description Role Name: Senior Infrastructure Administrator (Windows Server & VMware)
Work site: Toronto (Onsite)
Start date: Immediate availability.

Role Summary
We are seeking a highly skilled Windows Server and VMware Administrator to manage, maintain, and modernise enterprise infrastructure environments. The ideal candidate must possess strong expertise in Windows Server administration, VMware vSphere/ESXi, and server upgrade and migration projects. The individual will play a key role in planning, executing, and supporting Windows Server upgrade initiatives while ensuring high availability, security, and operational excellence.
Key Responsibilities
Windows Server Administration
• Administer and maintain Windows Server environments (2012, 2016, 2019, 2022 and later).
• Perform server provisioning, configuration, patching, and lifecycle management.
• Manage Active Directory, Group Policies (GPO), DNS, DHCP, and certificate services.
• Monitor server health, performance, capacity, and availability.
• Troubleshoot complex operating system and infrastructure issues.
Windows Server Upgrade & Migration
• Lead Windows Server upgrade and migration projects.
• Assess existing server landscapes and develop upgrade strategies.
• Perform in-place and side-by-side migrations.
• Coordinate application compatibility assessments.
• Execute upgrade activities with minimal business disruption.
• Develop rollback and contingency plans.
• Conduct testing, validation, and post-upgrade support.
VMware Administration
• Administer VMware vSphere, ESXi, and vCenter environments.
• Manage virtual machine lifecycle operations.
• Configure and maintain clusters, HA, DRS, vMotion, and Storage vMotion.
• Perform VMware host upgrades and patch management.
• Optimize virtual infrastructure performance and capacity.
Infrastructure Operations




• Support enterprise backup and disaster recovery solutions.
• Implement security hardening and vulnerability remediation.
• Manage monitoring tools and operational dashboards.
• Participate in Incident, Problem, and Change Management processes.
• Develop and maintain infrastructure documentation and standard operating procedures.
Automation & Scripting
• Automate routine administration tasks using PowerShell.
• Develop scripts for server provisioning, upgrades, compliance checks, and reporting.
• Improve operational efficiency through automation.
Technical Skills
Mandatory
• Windows Server 2012/2016/2019/2022 Administration
• VMware vSphere, ESXi, vCenter
• Active Directory, DNS, DHCP, Group Policy
• Windows Server Migration and Upgrade Planning
• PowerShell Scripting
• Patch Management (WSUS/SCCM/MECM)
• High Availability and Disaster Recovery
• Incident, Problem, and Change Management
Preferred
• VMware SRM
• Hyper-V
• Azure IaaS
• Veeam / Commvault Backup Solutions
• SCOM, SolarWinds, LogicMonitor
• Microsoft Entra ID (Azure AD)
• Storage and Compute Infrastructure (Dell, HPE, Cisco UCS)
Certifications (Preferred)
• VMware Certified Professional (VCP)
• Microsoft Certified: Windows Server Hybrid Administrator Associate
• Microsoft Azure Administrator Associate
• ITIL Foundation
Key Deliverables
• Successful execution of Windows Server upgrade projects.
• Improved infrastructure stability, availability, and security.
• Timely resolution of critical incidents.
• Compliance with patching and security standards.
• Accurate infrastructure documentation and operational runbooks.
Soft Skills
• Strong stakeholder communication.
• Excellent troubleshooting and analytical skills.
• Ability to lead infrastructure upgrade initiatives.
• Experience working with global teams and change windows.
• Solid documentation and presentation skills.

📌 Senior Infrastructure Administrator (Toronto)
🏢 Epsilon Solutions
📍 Toronto