System mainframe specialist M/F

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