Canadian Tire Corporation (CTC) is seeking a Sr. Specialist, SRE – Compute Platforms to serve as the enterprise technical owner for CTC's compute platforms, including IBM Mainframe (z/OS), AIX, IBM iSeries, IBM NOI, New Relic, and associated business-critical services and applications.
This role is accountable for platform governance, service ownership, lifecycle strategy, observability governance, vendor oversight, and reliability outcomes across the compute environment. Operational execution is performed by HCL/Harmony and other designated support providers. The Sr. Specialist provides governance, strategic direction, technical leadership, and vendor accountability.
Key Responsibilities Provide governance and oversight of HCL/Harmony-delivered Mainframe services, including z/OS lifecycle planning, platform currency, capacity strategy, LPAR governance, and infrastructure roadmap planning
Assess platform, OS, middleware, and application versions; identify lifecycle, supportability, security, and compliance risks; develop renewal and modernization strategies
Lead platform lifecycle governance activities including hardware refresh planning, OS upgrade strategy, maintenance governance, and long-term roadmap alignment
Define, govern, and periodically review monitoring and observability requirements for Mainframe infrastructure and business-critical services
Provide governance and oversight of disaster recovery readiness, resiliency planning, recovery testing, and recovery capability validation
Provide technical leadership and governance during major incidents, problem investigations, and corrective action planning
Establish governance standards for monitoring coverage, alerting requirements, event correlation, escalation models,



and service health dashboards
Drive continuous improvement of observability maturity, service visibility, monitoring effectiveness, and operational intelligence
Validate vendor-delivered services against contractual obligations, SOW commitments, service level expectations, and governance requirements
Lead vendor performance reviews, operational scorecards, service reporting reviews, and continuous improvement initiatives
Support audit, compliance, and control activities related to backup, recovery, disaster recovery, monitoring controls, and infrastructure lifecycle management
Lead continuous improvement initiatives focused on service maturity, reliability, observability, sustainability, risk reduction, and operational excellence
Requirements 10+ years of experience in platform ownership, infrastructure governance, Site Reliability Engineering (SRE), service management, or enterprise technology leadership
Robust background in Mainframe platform governance, including z/OS environments, lifecycle planning, capacity management, and vendor-managed support models
Experience governing enterprise monitoring, observability, event management, or operational intelligence practices across large-scale technology environments
Knowledge of AIX, IBM iSeries, enterprise middleware,



and application hosting environments supporting business-critical workloads
Experience governing enterprise storage and backup services, including capacity planning, recovery validation, and resiliency requirements
Experience supporting disaster recovery governance, DR exercises, recovery reporting, remediation tracking, and resiliency planning
Experience working within MSP-governed or vendor-managed service environments
Strong understanding of incident, problem, change, lifecycle, operational risk, vendor governance, and service management processes
Demonstrated ability to lead technical escalations and hold vendors accountable to service expectations
Strong communication skills with the ability to translate technical risk into clear operational and business impact
Preferred Qualifications Experience supporting IBM Mainframe environments, including z/OS, middleware, enterprise schedulers, and file transfer platforms
Experience with observability and monitoring platforms such as IBM OMEGAMON, ITM/Tivoli, Netcool, New Relic, Dynatrace, Splunk, Elastic, ThousandEyes, or equivalent
Familiarity with ServiceNow-based incident, event, problem, change, risk, vendor, and lifecycle management workflows
Experience governing infrastructure refreshes, hardware lifecycle initiatives, maintenance planning, and data centre change activities
Experience working with outsourced infrastructure providers including SOW governance, SLA management, and contract oversight
Location: Toronto, Ontario OR Calgary, Alberta (Hybrid: In-office 4 days a week)
Salary Range: $64,000 – $106,000 annually (typical hiring range: $64,000 – $85,000)

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📌 Sr. Specialist, SRE – Compute Platforms (Ontario)
🏢 Canadian Tire Corporation
📍 Ontario