Role Summary

We are seeking a senior Mainframe Security Administrator to secure and administer our IBM z/OS setting using RACF. You will own the RACF database, manage digital certificates, support auditing and compliance, and ensure security is configured correctly across a Parallel Sysplex setting.

Key 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.
Work with systems programmers, application teams, and security/GRC teams.
Create and maintain procedures, runbooks, and documentation.

Mandatory Skills
IBM z/OS: deep, hands-on knowledge of the operating system
Parallel Sysplex: working knowledge of Parallel Sysplex concepts.
RACF: robust knowledge of RACF concepts and administration, including RACF database management.
RACF digital certificates: hands-on experience with RACDCERT.
RACF auditing: hands-on experience.
8+ years of relevant mainframe security administration experience.

📌 Mainframe Security Administrator Melbourne
🏢 Cognizant
📍 Melbourne