Mainframe System Programmer
Confirmed on the employer's own hiring board on Oct 9, 2026. First seen by Alion on Sep 20, 2026.
About Atos Group
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 Group is the brand under which Atos SE (Societas Europaea) operates. Atos SE is listed on Euronext Paris.
The purpose of Atos Group is to help design the future of the information space. Its expertise and services support the development of knowledge, education and research in a multicultural approach and contribute to the development of scientific and technological excellence. Across the world, the Group enables its customers and employees, and members of societies at large to live, work and develop sustainably, in a safe and secure information space.
Job Name: Mainframe System Programmer
Company: Atos
Location: Mexico - Remote
Job Type: Full-time
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
Educational Background:
- Bachelor’s degree in Computer Science or a related field, or a relevant technical certification
Professional Experience:
- 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
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Here at Atos, diversity and inclusion are embedded in our DNA. Read more about our commitment to a fair work environment for all.
Atos is a recognized leader in its industry across Environment, Social and Governance (ESG) criteria. Find out more on our CSR commitment.
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