Mainframe System Engineer M - F H/F

Experis Luxembourg is currently looking for a Mainframe System Programmer that will performs advanced installation, configuration, customization, and support of core z / OS and associated subsystems (CICS, MQ, IMS) to ensure operational stability, performance, and security for one of our client based in Luxembourg.

Key Responsibilities

• Install, configure, upgrade, and maintain CICS, MQ, IMS, and z / OS software and associated products in line with enterprise standards and lifecycle best practices.
• Apply PTFs (Program Temporary Fixes), APARs (Authorized Program Analysis Reports), and oversee product patching and tuning to ensure systems are secure and up-to-date.
• Diagnose and resolve complex mainframe infrastructure issues, including in-depth error dump analysis, performance tuning, and support escalated incidents affecting middleware and operating system availability.
• Customize subsystem parameters, create and manage regions, started tasks, queue managers, and address spaces for CICS, MQ, and IMS.
• Automate and streamline operational activities using tools and scripting languages (REXX, JCL, CLIST) for monitoring, administration, and recovery.
• Collaborate with application, database, and network teams to ensure secure, efficient integration of middleware and core platform components.
• Implement access control, encryption, and compliance standards (e.g., RACF for security, SOX / PCI-DSS for regulatory).
• Lead or participate in disaster recovery drills and infrastructure tests to maintain business continuity readiness.
• Maintain up-to-date documentation for all system programming procedures, configurations, and change management activities.

Required Skills & Experience

• Extensive experience (typically 5+ years) as a system programmer supporting CICS, MQ, IMS, and z / OS.
• Demonstrated expertise with SMP / E, system software upgrades, subsystem customization, and debugging complex middleware / operating system issues.
• Strong scripting and automation capabilities (JCL, REXX, CLIST), and familiarity with operational monitoring tools.
• Proficiency in mainframe security administration (such as RACF) and regulatory compliance.
• Proven track record supporting high-availability environments and delivering incident-free operations.

Preferred Qualifications

• Experience with hybrid or cloud-mainframe integration technologies.
• IBM or vendor certifications in CICS, MQ, IMS, or z / OS.
• Strong communication, documentation, and cross-platform troubleshooting skills