Mainframe ZOS Admin

2 days ago

Chennai India Viraaj HR Solutions Private Limited Full time

Job Description About The Opportunity A leading provider in enterprise IT infrastructure and legacy systems operations serving banking, insurance and government clients. We deliver resilient mainframe operations, system migrations, and 24/7 production support for mission-critical workloads across India. This on-site role supports core infrastructure and application teams to ensure high-availability z/OS environments. Role & Responsibilities - Operate and maintain IBM z/OS production systems, ensuring stable 24x7 availability and timely incident resolution. - Implement and manage system maintenance using SMP/E: apply PTFs, APAR fixes, and coordinate system IPLs and migrations. - Troubleshoot JCL jobs, monitor batch scheduling, and work with schedulers (CA7/Control-M) to resolve backlogs and failures. - Manage security and access controls using RACF: provision accounts, review profiles, and support audits and compliance tasks. - Monitor capacity and performance; perform tuning and resource optimization for CPU, DASD, and storage to meet SLAs. - Develop and maintain runbooks, standard operating procedures, and participate in DR tests and on-call rotation for incidents. Skills & Qualifications Must-Have - Proven hands-on experience managing IBM z/OS production environments. - Strong knowledge of JCL and TSO/ISPF for job control and interactive troubleshooting. - Experience with SMP/E for patching, APAR management, and system maintenance. - Practical experience administering RACF and implementing security policies on z/OS. - Operational experience with CICS and/or DB2 in a production mainframe environment. - Experience in performance monitoring, capacity planning, and storage (DASD) management for mainframes. Preferred - Experience with job schedulers such as CA7 or Control-M and automation tooling. - Familiarity with IMS, z/OSMF, or IBM z Systems hardware (z14/z15 or newer). - Certifications such as IBM Certified System Administrator for z/OS or equivalent operational certifications. Benefits & Culture Highlights - Exposure to enterprise banking and government mainframe environments with opportunities for technical growth and certifications. - Structured shift/rotation allowance, on-site support teams, and a focus on operational excellence and knowledge-sharing. Location: On-site locations across India. Candidates must be available for on-site shifts and periodic off-hours support. This role is ideal for seasoned mainframe administrators seeking stable, mission-critical infrastructure responsibilities. Skills: cics,smp/e,mainframe,z/os,mainframe zos admin

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