System Mainframe specialist

Mainframe System Engineer (Z/OS)
Mainframe System Engineer (Z/OS) – Freelance Contract (6–12 Months)

We are currently supporting a key client on a strategic initiative and are looking for an experienced Mainframe System Engineer (Medior to Senior level) to join a dedicated mission within a critical z/OS environment.

Assignment Overview
This is a dedicated freelance assignment (or CDI via portage) with an initial duration of 6 to 12 months, with strong potential for extension depending on client needs and project evolution.

The role is focused on mainframe transformation, migration, and upgrade projects, including infrastructure modernization and system enhancements.


Location
  • On-site presence is mandatory

Conditions
  • Availability for weekend work (overtime may be required)
  • High-demand environment requiring strong stress management capabilities

Key Responsibilities
  • Actively contribute to mainframe LPAR migrations, specifically from z16 to z17
  • Manage and optimize z/OS environments
  • Work closely with IBM teams on hardware configuration and setup
  • Lead or support migration of mainframe tools, particularly from Broadcom solutions to IBM or BMC software
  • Participate in operating system upgrades and ongoing maintenance activities
  • Contribute to upgrades of third-party software (DB2, CICS, COBOL, IBM MQ, IWS, etc.)
  • Ensure stability, performance, and reliability of critical systems
  • Operate within structured IT processes aligned with ITIL standards

Required Skills & Experience
  • Proven experience as a Mainframe System Engineer (Medior or Senior level)
  • Deep expertise in z/OS (mandatory)
  • Demonstrated experience with mainframe LPAR migration (z16 to z17)
  • Strong background in hardware configuration in collaboration with IBM
  • Experience with mainframe tool migration (Broadcom to IBM or BMC environments)
  • Strong involvement in OS and software upgrade projects
  • Solid knowledge of mainframe ecosystems and third-party tools
  • ITIL knowledge is mandatory
  • Fluency in English is mandatory (written and spoken)

Soft Skills
  • Excellent communication skills, both written and verbal
  • Ability to work under pressure in highly critical environments
  • Strong sense of ownership and accountability
  • Proactive, autonomous, and solution-oriented mindset
  • Team player with strong collaboration skills

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Summary

Job Type
Contract
Industry
IT
Location
LUXEMBOURG
Specialism
Technology
Pay
Based on experience
Ref:
1448174

Talk to a consultant

Talk to Turkmen Ozer, the specialist consultant managing this position, located in Luxembourg
Hays, 65 Avenue de la Gare

Telephone: 352 268 654 03