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Our workplace embraces diversity and inclusion – it's a place where you can grow, belong and thrive. Your day at NTT DATA We are seeking an experienced z/OS Mainframe Systems Programmer to join our enterprise infrastructure team. The idóneo candidate will possess deep technical expertise in z/OS Systems Programming, strong Parallel Sysplex administration skills, and extensive experience working within large-scale, mission-critical environments such as banking and financial services organizations. The successful candidate will be a self-starter who can work independently, troubleshoot complex technical issues, and contribute effectively from day one. This position requires excellent communication skills, strong analytical thinking, collaboration with cross-functional teams, and participation in planned after-hours activities related to system upgrades, maintenance, and implementations. Responsibilities
* Install, configure, customize, upgrade, and maintain IBM z/OS operating systems.
* Manage and support IBM and CA/Broadcom system software products across enterprise environments.
* Plan and execute operating system upgrades and software maintenance activities using SMP/E.
* Administer and support large-scale Parallel Sysplex environments to ensure high availability and performance.
* Perform system performance monitoring, capacity planning, and resource optimization.
* Analyse and resolve complex system-level issues involving z/OS, middleware,



and infrastructure components.
* Work closely with application support, infrastructure, security, and operations teams to ensure platform stability.
* Implement software maintenance, fixes, service packs, and vendor-recommended updates.
* Support disaster recovery, business continuity, and high-availability initiatives.
* Maintain system security controls and ensure compliance with organizational standards.
* Create and maintain technical documentation, procedures, and operational runbooks.
* Participate in root cause analysis and problem management activities.
* Provide technical guidance and mentoring to junior team members.
* Support production implementations and planned maintenance activities, including off-hours and weekend work when required. Required Qualifications 10+ years of hands-on experience in z/OS Systems Programming.
* Deep knowledge of: o z/OS Operating System o SMP/ETSO/ISPF o UNIX System Services (USS) o SDSF o JCL o RACF
* Strong expertise in Parallel Sysplex implementation and support as well as Parallel Sysplex architecture and administration
* Extensive experience installing, configuring, customizing, supporting and maintaining multiple IBM and CA/Broadcom mainframe products.
* Experience working in large enterprise environments, preferably within Banking or Financial Services.
* Strong troubleshooting and problem-solving capabilities.
* Ability to independently manage complex technical assignments.




* Excellent verbal and written communication skills.
* Experience supporting mission-critical production environments with stringent SLA requirements. Desired Qualifications
* Experience with ACF2 Security Administration.
* Knowledge of GDPS (Geographically Dispersed Parallel Sysplex) environments.
* Working knowledge of: AssemblerREXXOMEGAMONRMFSMFSAS
* Experience with automation and operational tooling in mainframe environments.
* Understanding of disaster recovery and high-availability architectures.
* Exposure to hybrid infrastructure environments and modernization initiatives.
* Industry certifications related to IBM Z Platforms or Mainframe Systems Programming are desirable. Job Expectations
* Deliver stable, secure, and highly available mainframe infrastructure services.
* Participate in change management, release management, and implementation activities.
* Provide on-call and after-hours support for critical production changes and incident resolution.
* Ensure adherence to enterprise security, compliance, and operational standards.
* Collaborate with global teams and stakeholders across infrastructure, applications, and business units.
* Drive continuous improvement initiatives focused on system reliability, performance, and automation.
* Maintain thorough documentation of system configurations, procedures, and technical implementations.
* Demonstrate ownership, accountability, and a proactive approach to issue resolution.
* Act as a trusted technical expert for z/OS platform services and system software products. Primary Skillset z/OSSMP/ETSO/ISPFUSS (UNIX System Services)SDSFJCLRACFParallel Sysplex Secondary Skillset ACF2GDPSRACF AdministrationAssemblerREXXOMEGAMONRMFSMFSAS Bene

📌 Senior Z/Os Mainframe Systems Programmer (España)
🏢 NTT DATA
📍 España