Mainframe z/OS System Programmer

• 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

• 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
• 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
• Ability to work independently and collaboratively in a remote environment

• Remote work in Mexico
• Participation in an on-call rotation as required