Job Name: Mainframe System Programmer - ******Company: AtosLocation: Mexico – RemoteLunes – ViernesOn Call availability 24/7 for emergenciesJob Type: Full-time Role Overview:The Mainframe System Programmer is responsible for the installation, maintenance, problem diagnosis, and administration of the z/OS Mainframe operating system.This role ensures system stability, performance, and compliance with Atos security standards while supporting continuous service improvement.The position requires close collaboration with internal teams and includes participation in an on-call rotation.Key Responsibilities:Install, upgrade, and administer the z/OS operating system, including RSU maintenancePerform system changes in accordance with company regulations, security standards, and internal controlsProvide IPL support and resolve JES2/JES3 issuesMaintain TSO/ISPF environments, including CLIST, REXX, and PROC maintenancePerform MVS tuning and manage PARMLIBCreate and manage LPARsExecute SMP/E acti...