IBM z/OS systems programming / Mainframe infrastructure Patching Lead

Toronto, ON
Hybrid
Posted Oct 2, 2026
1 position

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Employment type: Contract
Experience level: Senior · 8+ years
Posting language: English
Working hours: 40 hours per week
Seniority: Mid-Senior level
Application method: Apply on LinkedIn (LinkedIn sign-in required)

Job summary

Own the IBM z/OS patching strategy and maintenance lifecycle, including assessing and prioritizing updates, coordinating change windows, and overseeing testing and production implementation. Direct and quality-control offshore team execution, track compliance, manage escalations, and partner with security and audit teams on remediation and regulatory requirements.

Job details

Job Title : IBM z/OS systems programming / Mainframe infrastructure Patching Lead Employment Type : Contract Location: Toronto, ON, Canada (Hybrid) Job Description : The Mainframe Infrastructure Patching Lead is a senior individual contributor accountable for the end-to-end patch and maintenance lifecycle of the organization's IBM z/OS environment. This role sets patching strategy and technical standards, performs hands-on maintenance work, and directs the day-to-day execution carried out by an offshore mainframe support team. The Lead is the primary technical authority on SMP/E maintenance, vendor service management, and change coordination, and is accountable for ensuring the offshore team executes patching safely, on schedule, and in compliance with security and audit requirements. Key Responsibilities • Own the IBM z/OS patch management strategy, including SMP/E maintenance (PTFs, APARs, RSU/CSI management) and subsystem patching (CICS, DB2, IMS, MQ, RACF, and related products). • Define the rolling patch and maintenance calendar in alignment with IBM service delivery cycles, security advisories, and enterprise change freeze windows. • Assess incoming IBM and ISV maintenance for applicability, risk, and priority; triage HIPER, security, and integrity PTFs for expedited handling. • Set technical direction for, and provide hands-on oversight of, an offshore mainframe operations team executing patch installs, regression testing, and validation across the z/OS estate. • Establish and enforce patching standards, runbooks, and quality checkpoints so offshore-executed work meets the same bar as work performed directly. • Review and approve patch testing results, rollback plans, and go/no-go decisions before production implementation, including for changes executed by the offshore team. • Coordinate with systems programmers, security, and application teams to plan patch windows and manage changes through the CAB process. • Track patch compliance across the mainframe estate; report on outstanding vulnerabilities, aging maintenance, and remediation timelines to management. • Serve as the primary escalation point for patch-related incidents, including issues surfaced by the offshore team during off-hours windows; lead root cause analysis and remediation. • Partner with InfoSec and audit on vulnerability scans, regulatory findings, and compliance requirements (e.g., PCI-DSS, SOX, internal controls). • Maintain and continuously improve patching documentation, standard operating procedures, and knowledge transfer materials used by the offshore team. • Bridge time-zone and communication gaps with the offshore team through structured handoffs, clear written procedures, and regular sync checkpoints. What you will need to succeed in this role • 8+ years of experience in IBM z/OS systems programming or mainframe infrastructure operations, with demonstrated depth as a senior technical contributor. • Hands-on expertise with SMP/E, z/OS maintenance processes, and IBM service delivery (PTFs, APARs, HOLDDATA, RSU/CSI management). • Strong working knowledge of z/OS and core subsystems (JES2/JES3, RACF, CICS, DB2, IMS, or similar). • Experience directing or closely coordinating with an offshore or distributed technical team, including reviewing their work and holding them to defined standards. • Experience with change management processes and tooling (e.g., ServiceNow) in a regulated enterprise environment. • Familiarity with vulnerability management and security patch prioritization frameworks. • Strong troubleshooting skills and experience designing and validating rollback/contingency plans. • Excellent written communication skills, with the ability to produce clear runbooks and procedures for execution by a remote team. • Willingness to support off-hours and weekend patch windows, including coordination across time zones with the offshore team. Preferred Qualifications • Experience with automated patch deployment or maintenance tracking tools. • Familiarity with IBM zPCR and Fix Category management. • Exposure to parallel sysplex environments and coordinated multi-LPAR patching. • Background in audit/compliance reporting for mainframe environments. • Prior experience building or refining offshore/onshore delivery models for infrastructure operations. • ITIL Foundation certification or equivalent change/incident management experience. Key Competencies • Risk-based decision making under time constraints. • Ability to lead and quality-control work performed by a remote/offshore team without direct supervision on-site. • Meticulous attention to detail and documentation discipline. • Clear, calm communication during incidents or escalations, across time zones. • Comfort operating as a hands-on senior contributor while also acting as the de facto technical lead for a distributed team.

What you’ll do

Requirements

Requires 8+ years of IBM z/OS systems programming or mainframe infrastructure experience, hands-on SMP/E and maintenance expertise, and working knowledge of z/OS and core subsystems. Candidates should have experience coordinating distributed or offshore teams, regulated-environment change management, vulnerability prioritization, troubleshooting, and producing clear operational documentation.