Mainframe z/OS System Programmer - DP

We are seeking an experienced Mainframe z/OS System Programmer to install, customize, maintain, and optimize IBM z/OS operating systems and associated system software. The ideal candidate will ensure the stability, performance, security, and availability of mission-critical mainframe environments supporting large-scale enterprise applications., 1. System Administration and Maintenance

• Install, configure, customize, and maintain IBM z/OS operating systems.
• Perform system upgrades, migrations, and maintenance activities, including PTFs, APARs, and RSUs.
• Manage Initial Program Load (IPL) processes, system initialization, and configurations involving PARMLIB, PROCLIB, and SYS1 datasets.
• Monitor system health and performance using tools such as RMF, SMF, and SDSF.

1. Subsystem Support and Integration * Install, configure, and support key mainframe subsystems, including:

• JES2/JES3
• TSO/E and ISPF
• UNIX System Services (USS)
• RACF, in coordination with security teams
• Collaborate with DB2, CICS, IMS, MQ, and storage teams to support subsystem integration and resolve technical issues.

1. Performance and Capacity Management * Analyze system performance metrics and implement tuning improvements. * Support capacity planning and resource optimization across CPU, memory, and I/O. * Evaluate hardware capacity requirements and upgrades, including CPU/MIPS growth and IBM Z platform enhancements. * Identify opportunities to improve system efficiency, availability, and performance.

2. Problem Management and Troubleshooting * Diagnose and resolve system-related issues, including system abends, failures, and performance degradation. * Perform root cause analysis for outages and major incidents. * Coordinate with IBM and other software vendors to investigate technical issues and implement fixes. * Support problem management activities to minimize recurring incidents and service disruptions.

3. Automation and Job Scheduling * Develop and maintain automation solutions using System REXX and CLIST. * Support automation tools such as System Automation for z/OS (SA z/OS) and NetView. * Work with job scheduling tools such as CA-7 and Control-M, where applicable. * Identify opportunities to automate routine system administration and maintenance activities.

4. Security and Compliance * Support system-level security configurations aligned with RACF policies. * Ensure compliance with enterprise security standards, regulatory requirements, and audit controls. * Assist with vulnerability remediation, system patching, and security maintenance. * Collaborate with security teams to maintain a secure and compliant mainframe environment.

5. Change and Release Management * Execute system changes according to ITIL-based change management processes using ServiceNow or equivalent tools. * Prepare implementation plans, backout procedures, and post-implementation validation steps. * Participate in scheduled maintenance windows, including weekend maintenance and IPL activities. * Ensure changes are properly documented, tested, and implemented with minimal operational disruption.

6. Documentation and Disaster Recovery * Create and maintain technical documentation covering system configurations and operational procedures. * Develop and update Standard Operating Procedures (SOPs). * Maintain disaster recovery documentation and support recovery planning and testing. * Ensure system maintenance activities and configuration changes are accurately documented.

• 5+ years of experience in mainframe system programming with IBM z/OS.
• Strong hands-on knowledge of z/OS, JES2/JES3, TSO/ISPF, SDSF, USS/OMVS, and SMP/E.
• Experience supporting large-scale mainframe environments, including multiple LPARs and Parallel Sysplex.
• Knowledge of mainframe software and vendor products from IBM, Broadcom, and BMC.
• Strong troubleshooting, problem determination, and root cause analysis skills.
• Understanding of system maintenance, performance tuning, capacity planning, and security administration.
• Ability to support production environments and participate in scheduled maintenance activities.

Preferred Qualifications

• IBM mainframe certifications are preferred but not mandatory.
• Exposure to mainframe modernization initiatives, including APIs and hybrid cloud integration.
• Experience with z/OS Management Facility (z/OSMF) and modern mainframe interfaces.
• Knowledge of mainframe DevOps practices and CI/CD pipelines.
• Familiarity with Zowe and API-based integration on z/OS.