Jobs → Engineering → Mainframe Engineer

About the Role We are seeking a Mainframe Engineer with expertise in performance and capacity management to join our technical team. This is a long-term contract role focused on optimizing IBM z/OS systems. Key Responsibilities • Monitor and optimize IBM z/OS performance across CPU, memory, DASD, and WLM-managed workloads • Analyze SMF/RMF data using RMF, SmartIS, MICS, and other monitoring tools • Troubleshoot real-time performance bottlenecks, resource anomalies, and production issues • Tune WLM service definitions, dispatching priorities, batch initiators, and workload placement • Perform capacity planning, workload forecasting, infrastructure sizing, and resource optimization • Support IBM SCRT reporting, cost modeling, and capacity utilization analysis • Develop performance reports, dashboards, KPIs, and data visualizations for leadership • Collaborate with operations, development, and infrastructure teams to improve system reliability • Support migration of performance and capacity tools into Git-based change management and DevOps pipelines Requirements • 15+ years of experience in mainframe engineering • Expertise in IBM z/OS Performance Management • Experience with Multi-LPAR and Parallel Sysplex Environments • Strong skills in SMF/RMF Data Analysis and WLM Tuning • Mainframe Capacity Planning and Performance Monitoring experience • JCL and DB2 knowledge • PR/SM Fundamentals understanding • Advanced Excel skills: Pivot Tables, VLOOKUP, PowerPivot and Charts • PowerPoint Reporting and Data Visualization abilities • 10+ Years of Mainframe Experience Good to Have • REXX / Python • IBM SCRT Reporting • MICS Product and Reporting • DevOps and Git-based deployment pipelines