Mainframe Performance & Capacity / Tunning

Performance Engineering & Monitoring Monitor and analyze system performance indicators across z/OS, subsystems (CICS, IMS, DB2, MQ), and batch/online workloads. Identify performance bottlenecks and implement corrective actions to improve throughput and response times. Conduct periodic health checks and provide performance dashboards, reports, and trend analyses. Capacity Planning & Forecasting Perform short- and long-term capacity planning, ensuring adequate CPU, memory, storage, and network resources. Develop models and forecasts based on business growth, seasonality, and workload projections. Provide recommendations for hardware upgrades, software optimization, and resource allocation strategies. System & Application Tuning Tune system parameters to optimize performance for z/OS and related subsystems. Collaborate with application teams to tune JCL, SQL, COBOL programs, and transaction processing workloads. Optimize batch processing windows and workload scheduling to improve system efficiency. Incident & Problem Management Act as SME during major incidents involving performance degradation or system saturation. Conduct root-cause analysis for recurring performance issues. Provide technical guidance and recommendations to prevent incident recurrence. Tools & Automation Use mainframe performance tools such as RMF, SMF, OMEGAMON, TMON, MainView, Strobe, or equivalent. Develop and enhance automation scripts for performance data extraction and analysis. Maintain capacity and performance dashboards using enterprise monitoring tools. Collaboration & Governance Work with architecture and infrastructure teams to design scalable and resilient mainframe solutions. Participate in technology roadmaps, platform modernization, and cost-optimization initiatives. Provide performance-related input during change management, release planning, and application onboarding. Required Qualifications: Strong experience with z/OS mainframe environments, including JES2/JES3, WLM, RACF, and core subsystems. Proficiency in analyzing SMF/RMF data and interpreting system performance metrics. Hands-on experience with performance and tuning tools (e.g., OMEGAMON, Strobe, TMON, RMF Monitor III). Solid understanding of MIPS/MSU consumption, workload classification, and WLM policies. Experience in capacity modeling and forecasting methodologies. Strong analytical, troubleshooting, and diagnostic skills. Ability to communicate complex technical concepts in a clear and concise manner. Preferred Qualifications: Experience tuning DB2, CICS, IMS, or MQ subsystems. Knowledge of mainframe cost optimization (e.g., Tailored Fit Pricing / R4HA). Familiarity with DevOps practices in mainframe environments. Experience supporting mission-critical, high-availability workloads. Bachelor's degree in Computer Science, Information Technology, Engineering, or equivalent experience.

Created: 2026-03-06