Mainframe Programmer
Job Title: Mainframe Performance & Capacity Planning Engineer (z/OS) Location: 100% Remote Client : Domain: Banking & Financial Services (BFSI) Duration: 12 Months + Extension / Contract-to-Hire Interview Process: 2 Rounds via Zoom Job Summary STAFFXPERT is experienced Mainframe Performance & Capacity Planning Engineer with 10+ years of z/OS experience to manage real-time performance monitoring, capacity planning, performance tuning, and data analytics in large-scale, multi-LPAR and Parallel Sysplex environments.
Key Responsibilities
Monitor real-time z/OS performance across CPU, memory, DASD, and WLM-managed workloads. Analyze SMF/RMF data to identify performance bottlenecks, anomalies, and capacity issues. Troubleshoot production performance issues using WLM service definitions, dispatching priorities, and batch initiator adjustments. Perform capacity planning, workload forecasting, resource utilization analysis, and infrastructure sizing. Analyze large datasets and develop performance reports, dashboards, charts, and KPIs. Present analytical findings, performance trends, and recommendations to senior leadership. Support cost modeling, capacity optimization, and infrastructure reporting. Collaborate with infrastructure, application, operations, and DevOps teams to improve system performance. Required Skills 10+ years of mainframe experience, specifically with z/OS performance management. Hands-on experience with large-scale, multi-LPAR and Parallel Sysplex environments. Strong expertise in SMF/RMF, WLM, and z/OS workload behavior. Experience troubleshooting real-time performance issues and tuning WLM and batch initiators. Strong performance monitoring, capacity planning, and data analysis experience. Proficiency in JCL and DB2, with working knowledge of CICS. Basic understanding of PR/SM. Advanced Excel skills, including Pivot Tables, charts, VLOOKUP, and PowerPivot. Strong analytical and statistical skills, including interpreting charts, identifying trends, and developing hypotheses. Experience creating performance dashboards and presenting actionable insights to senior leadership. Excellent communication and presentation skills. Ability to work independently and collaborate with cross-functional teams. Preferred Skills Experience with SmartIS, MICS, and other mainframe performance monitoring tools. Knowledge of IBM SCRT reporting and MICS reporting. Proficiency in REXX or Python. Experience with Git, DevOps practices, and deployment pipelines. Experience with cost modeling and advanced capacity forecasting techniques.