Mainframe System Maintenance & Administration Engineer

Key Responsibilities

• Perform day-to-day administration and maintenance of mainframe systems (z/OS)
• Maintain system performance, capacity, and availability; take proactive measures to optimize performance
• Execute system upgrades, apply patches (PTFs), and maintain system software
• Manage and troubleshoot batch jobs using scheduling tools like Control-M or CA-7
• Handle dataset allocation, storage management, and backup/recovery processes
• Administer security through RACF, including user access control and auditing
• Support and maintain core subsystems such as CICS, DB2, and IMS
• Diagnose and resolve system issues, abends, and performance bottlenecks
• Develop and maintain JCL and REXX scripts for automation and job processing
• Participate in disaster recovery planning, testing, and execution
• Maintain documentation for system configurations, procedures, and processes
• Collaborate with cross-functional teams to support business-critical applications

Required Qualifications

• Bachelor’s degree in Computer Science, IT, or a related field
• 5+ years of experience in mainframe system administration or support
• Strong knowledge of z/OS operating system
• Hands-on experience with JCL and mainframe utilities
• Experience with job scheduling tools (Control-M, CA-7)
• Knowledge of RACF or equivalent security tools
• Familiarity with CICS, DB2, or IMS environments
• Strong analytical and troubleshooting skills

Preferred Qualifications

• Experience with REXX scripting or automation tools
• Knowledge of system monitoring tools (OMEGAMON, RMF)
• Exposure to disaster recovery and high availability environments
• IBM Mainframe certifications