Sr z/OS Systems Administrator (United States)

Full-time

TWO95 International, Inc

Our Client is seeking an experienced Senior z/OS Systems Administrator to support and maintain a large-scale IBM mainframe environment. The ideal candidate will be a senior-level z/OS professional with deep hands-on expertise in SMP/E, REXX scripting, and z/OSMF , along with strong knowledge of z/OS systems administration, maintenance, upgrades, troubleshooting, and automation.

• Perform deep-dive security assessments to identify control gaps and vulnerabilities

• Analyze and translate technical findings into business risk and impact

• Define practical remediation strategies and implementation guidance for engineering teams

• Review and strengthen RACF controls (DATASET, FACILITY, UNIXPRIV, STARTED)

• Evaluate USS security posture (UID/GID, OMVS, POSIX, zFS)

• Assess SMF, audit logs, and control effectiveness

• Partner with stakeholders to ensure sustainable risk reduction and compliance alignment

This position requires an individual who can work independently, troubleshoot complex mainframe system issues, perform system-level maintenance and upgrades, and develop automation to improve the reliability and efficiency of the z/OS environment.

Apply

Vacancy posted 18 hours ago

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