Mainframe z/OS System Programmer

Atos; Ciudad de México; On-site; MXN 500,000 - 750,000; Full time

Job summary

Atos is seeking a Mainframe System Programmer to support the installation, maintenance, and administration of the z/OS operating system in a global, collaborative environment. The role focuses on system reliability, performance, and security while enabling continuous improvement initiatives.

You will install and upgrade z/OS, apply SMP/E, manage JES2/JES3, maintain TSO/ISPF, and work with ISV products such as CA1, CA7, CA11, Syncsort, and File-Aid.

Qualifications

• Proven experience in z/OS installation, maintenance, and administration.
• Strong SMP/E knowledge and mainframe tooling.
• Proficiency in JCL, ISPF, REXX, CLIST.
• Experience with ISV products such as CA1, CA7, CA11, Syncsort and File-Aid.
• Verbal and written proficiency in English.

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.

Skills

z/OS installation & maintenance

SMP/E

JCL

ISPF

REXX

CLIST

English proficiency

Education

Bachelor's degree in Computer Science or related field

Relevant technical certification

Tools

SMP/E

CA1

CA7

CA11

Syncsort

File-Aid

Mainview

System Automation

ASG

BMC products

Job description

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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.

Company: Atos

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