Job Description
We are seeking a Senior Mainframe System Programmer with deep technical expertise and hands-on experience to join our clients high-performing IT infrastructure team. This is a critical role supporting enterprise-grade mainframe systems, tools, and application environments across distributed and host systems.Key Responsibilities:Lead the installation, upgrade, and customization of z/OS ISV software in a multi-system mainframe environment.
Act as the primary SME for installing and maintaining:
CA Suite of Products
IBM Program Products
IBM WebSphere MQ for z/OS
SAS MXG
Omegamon Suite & Boxscore
Automation tools (SA/390, CA OPSMVS)
Provide comprehensive support to Application Development, IT Infrastructure, Operations, and Production Support teams.
Manage system performance, capacity planning, and hardware configuration to ensure high availability.
Maintain Disaster Recovery (DR) readiness and participate in DR exercises.
Use IBM and ISV support portals to manage issue tickets and resolutions.
Proactively monitor systems and implement improvements to prevent downtime.
Participate in 24x7 on-call rotations for critical support.
10–20 years of experience as a z/OS Mainframe System Programmer.
Expert knowledge of:
JCL, JES2, DFSMS, DFHSM, DFDSS, SDSF, DFSORT
TSO, ISPF/PDF
Proficiency with scripting and programming languages such as REXX and COBOL.
Strong working knowledge of:
CA Technologies tools: CA-VIEW, CA-DELIVER, SYSVIEW, EASYTRIEVE, CA-1, CA-7
EOS, FOLDERS, and additional ISV products
Familiarity with UNIX/Linux, Windows, and optionally z/VM.
Skilled in performance tuning, capacity management, and root-cause analysis.
Senior z/OS Mainframe System Programmer • Toronto, ON
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