Mainframe Administrator

Mainframe Administrator About the Role We’re looking for an experienced Mainframe Administrator to manage, maintain, and optimize enterprise-level mainframe systems that power business-critical applications. This role requires deep technical expertise in IBM Z systems and a proactive approach to performance tuning, security, and automation. Key Responsibilities Manage day-to-day operations of mainframe infrastructure (z/OS, JES2/JES3, TSO/ISPF, RACF, etc.) Install, configure, and upgrade mainframe system software and related tools Monitor system performance, troubleshoot issues, and apply preventive maintenance Manage user access, security configurations, and compliance controls Implement storage management, job scheduling, and batch processing Work closely with application and infrastructure teams to support deployments and system changes Perform system backups, DR testing, and ensure high availability across environments Prepare documentation for system changes, upgrades, and operational procedures Must-Have Qualifications Bachelor’s degree in Computer Science, Information Technology, or equivalent 5+ years of experience in mainframe administration (IBM z/OS environment) Solid experience with RACF, JCL, TSO/ISPF, JES2/JES3, SMP/E, VTAM, TCP/IP Strong knowledge of storage management (DFSMS, DASD, Tape) and performance monitoring tools (RMF, OMEGAMON, CA-SYSVIEW, etc.) Hands-on experience with system tuning, IPL, maintenance, and patch management Experience in problem management, incident resolution, and root cause analysis Excellent communication and documentation skills Good-to-Have Experience with Mainframe modernization or migration projects Familiarity with automation tools (Rexx, CLIST, JCL scripting) Knowledge of z/VM, CICS, or DB2 systems administration ITIL or IBM mainframe certifications #J-18808-Ljbffr