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1–2 jobs· newest first

Mainframe z/OS System AdministratorNew
Kyndryl · Chennai, India
Mainframe Security Administrator
Cognizant
Senior

+10K new in the last hour

Mainframe z/OS System Administrator

Kyndryl · Posted Nov 9, 2026

Chennai, Tamil Nadu, India
10+ years

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Manage and support IBM z/OS environments, perform installations, upgrades, maintenance, and modernization initiatives.

Responsibilities

Manage and administer IBM z/OS systems and associated software products.
Perform z/OS installations, upgrades, maintenance, and customization activities.
Monitor system performance, capacity, and availability to ensure optimal operations.
Troubleshoot and resolve operating system, hardware, and software issues.
Administer JES2/JES3, TSO/ISPF, SMP/E, HCD, and system utilities.

Requirements

Nice to have: IBM z/OS architecture design
Nice to have: mainframe modernization initiatives
Nice to have: supporting IBM z16 and IBM z17 systems
Nice to have: leadership and mentoring experience

Skills

Mainframe z/OS System Administration z/OS installation z/OS configuration z/OS maintenance system reliability patch management third-party software management SYSRES builds PTFs disaster recovery drills license key updates product maintenance upgrades compatibility checks z/OS 3.1 IBM z16 hardware troubleshooting system failures freeze job abends performance issues 24/7 on call support migration projects mainframe modernization Parallel Sysplex GDPS IBM z16 IBM z17 mainframe integration with Azure AWS Google Cloud

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Mainframe Security Administrator

Cognizant · Posted Nov 7, 2026

Senior
8+ years

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We are seeking a senior Mainframe Security Administrator to secure and administer our IBM z/OS environment using RACF.

Responsibilities

Administer RACF users, groups, and resource profiles, and maintain resource access lists
Manage the RACF database: backup databases, database housekeeping, and monitoring of usable database space
Run and interpret RACF utilities for database initialization, split/merge/extend, unload, and verification
Plan and execute database changes, such as switching to a backup database, with controls to prevent corruption from incorrect database sharing
Provide 2nd/3rd-level support for z/OS security incidents and access issues

Skills

IBM z/OS Parallel Sysplex RACF RACDCERT RACF auditing

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