System mainframe specialist M/F
Published on 19/05/2026
Hays Luxembourg
Working time
Type of contract
Professional experience
Educational level
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