Senior Systems Administrator - Infrastructure & Cloud

Toronto, ON
On-site
Posted Sep 18, 2026
1 position

$120,000 / year

Opens LinkedIn

Employment type: Full-time
Experience level: Senior · 7+ years
Posting language: English
Working hours: 40 hours per week
Seniority: Mid-Senior level

Job summary

Maintain the stability of the server and infrastructure estate while leading the technical execution of cloud adoption and platform modernization. Responsibilities include managing hybrid Azure environments, overseeing data migrations, and ensuring business continuity through robust backup and recovery processes.

Job details

Job title: Senior Systems Administrator - Infrastructure & Cloud Duration: Permanent Role status: Current opening Our client: A Canadian manufacturer in the Greater Toronto Area, running a continuous production environment supported by a modern in-house IT function. Intro: Reporting to the Director of Technology, this role keeps the server and infrastructure estate stable day to day while leading the technical side of the organization's modernization programme - cloud adoption, platform upgrades, and application and data migration. It suits a hands-on senior administrator who wants ownership of the environment rather than a narrow queue, and who is comfortable planning a cutover as well as running the platform afterwards. Principal tasks and responsibilities include: Administering and maintaining the physical and virtual server estate, monitoring performance, capacity and availability Owning the Windows Server environment end to end, including Active Directory, Group Policy, DNS and DHCP Maintaining storage, backup and disaster recovery platforms, and keeping business continuity processes in place and tested Administering Microsoft 365 and the cloud-connected services alongside it Planning and carrying out infrastructure upgrades and hardware lifecycle management Supporting Azure services across a hybrid estate - virtual machines, storage, networking and identity Contributing to cloud migration planning and then implementing it, and monitoring and optimizing cloud consumption and cost Leading the technical planning and execution of server, application and data migrations, including cutover and rollback plans Moving workloads off legacy platforms onto current ones, and validating migrated data and systems before sign-off Supporting ERP, application and wider infrastructure modernization initiatives Applying infrastructure security practice: access control, privileged account management, patch management and vulnerability remediation Maintaining technical documentation and system architecture diagrams Working alongside internal IT staff, vendors and project teams Taking part in planned after-hours maintenance and upgrade windows as required Qualifications and pre-requisites: Minimum 7 years of IT infrastructure and server administration experience Minimum 7 years managing Active Directory, DNS, DHCP and Group Policy Expert-level Azure: Entra ID, virtual machines, storage, networking and App Services Experience with SSO, MFA, Conditional Access, RBAC and advanced security policies Experience with VMware, Hyper-V or comparable virtualization technologies Experience with backup, disaster recovery and business continuity technologies Strong understanding of networking fundamentals Demonstrated experience leading infrastructure, cloud and ERP migrations Microsoft 365 administration experience Automation experience with PowerShell, Azure CLI, Terraform or equivalent tooling Experience supporting a cloud transformation initiative Familiarity with VOIP telephony, label printers and bar code scanners Sound understanding of IT service management, and of change and release management procedures Able to analyze, evaluate and define needs, and to create and execute implementation test plans Strong analytical, problem-solving, organizational and time-management skills Excellent communication, customer service and presentation skills, working well independently and as part of a team Experience supporting manufacturing production environments is an asset Knowledge of budget and vendor management is an asset Additional information or perks: Profit sharing Health and dental coverage Health care spending account Education assistance programme Employee assistance programme (EAP) Paid holidays and floater days Shift premiums Company events isgSearch does not use artificial intelligence throughout the hiring process.

What you’ll do

Requirements

Requires a minimum of 7 years of experience in IT infrastructure and server administration with expert-level proficiency in Azure and Active Directory. Candidates must have demonstrated experience leading cloud migrations and utilizing automation tools like PowerShell or Terraform.