Mainframe z/OS System Programmer

Mainframe z/OS System Programmer

Atos Group is a global leader in digital transformation with c. 63,000 employees and annual revenue of c. €8 billion, operating in 61 countries under two brands — Atos for services and Eviden for products. European number one in cybersecurity, cloud and high performance computing, Atos Group is committed to a secure and decarbonized future and provides tailored AI-powered, end-to-end solutions for all industries.

Atos is looking for a Mainframe System Programmer to support the installation, maintenance, and administration of the z/OS Mainframe operating system. This role plays a key part in ensuring system reliability, performance, and security while supporting continuous improvement initiatives in a global and collaborative environment.

Role Overview

Atos is looking for a Mainframe System Programmer to support the installation, maintenance, and administration of the z/OS Mainframe operating system. This role plays a key part in ensuring system reliability, performance, and security while supporting continuous improvement initiatives in a global and collaborative environment.

Key Responsibilities

Install, upgrade, and administer the z/OS operating system, including RSU maintenance. Perform system changes in line with Atos security standards and internal controls. Provide IPL support and resolve JES2/JES3 issues. Maintain TSO/ISPF environments, including CLIST, REXX, and PROC maintenance. Perform MVS tuning and manage PARMLIB. Create and manage LPARs. Execute SMP/E activities including Receive, Apply, USERMOD, and exit management. Install and upgrade ISV products such as CA1, CA7, CA11, Syncsort, File-Aid, Abend-Aid, Mainview, System Automation, ASG, and BMC products. Support testing, implementation, and deployment of new or improved systems and product upgrades. Collaborate with internal teams, management, and clients to drive continuous service improvement. Participate in on-call rotation as required.

Must-have Qualifications / Skills

Proven experience in installation, maintenance, problem diagnosis, and administration of z/OS. Strong working knowledge of SMP/E. Proficiency in JCL, ISPF, REXX, CLIST, and SMP/E. Experience with multiple mainframe products including security, resource, performance, storage, scheduling, application, and hardware management tools. Verbal and written proficiency in English. Bachelor's degree in Computer Science or a related field, or a relevant technical certification. Experience supporting enterprise mainframe environments. Hands-on involvement in z/OS installations and upgrades.

Soft Skills

Strong communication and stakeholder management skills. Ability to work independently and collaboratively in a remote environment. Analytical mindset with a focus on system stability and service quality.

Good-to-have Qualifications / Skills

Experience with multiple ISV products across the mainframe ecosystem. Familiarity with large, complex, or global IT service environments. System-level experience with CICS, IMS, DB2, Communications, and MQ is a strong plus; candidates with this experience will be prioritized for interview.