Sr Mainframe Capacity & Performance Engineer

Job Description

Key Responsibilities

• Monitor, analyze, and optimize performance across IBM zSystems mainframe environments.
• Conduct capacity planning, workload forecasting, resource utilization analysis, and long-range capacity projections.
• Perform MIPS forecasting using IBM zPCR and z/OS AIOps toolsets.
• Run application load tests and assess production readiness based on CPU, memory, throughput, and workload metrics.
• Conduct capacity and performance assessments for production and integration environments, including before-and-after test comparisons.
• Identify bottlenecks, performance risks, and resource constraints in application and infrastructure performance.
• Support performance engineering for CICS, DB2, z/OS Connect, WebSphere Application Server (Traditional and Liberty), and IBM MQ.
• Perform real-time Sysplex, LPAR, and CEC monitoring, root cause analysis, and tuning.
• Build and maintain automated SAS-based reporting for resource utilization, trending, forecasting, and performance analysis.
• Produce performance reports, trend analyses, capacity forecasts, and executive recommendations.
• Create and maintain technical documentation, SOPs, diagrams, and knowledge repositories.
• Support business resiliency, disaster recovery, data replication, and hybrid cloud initiatives.
• Participate in modernization efforts, proofs of concept, emerging technology evaluations, Agile activities, and continuous improvement.
• Recommend system configuration changes to improve performance, availability, and scalability.
• Support after-hours troubleshooting and problem determination as required.
  
  

Experience

Required Qualifications

• 7 years supporting IBM zSystems mainframe performance engineering, capacity planning, forecasting, and systems performance analysis.
• Analyzing, monitoring, and tuning z/OS and zLinux environments.
• Application load testing, workload analysis, performance benchmarking, and production readiness assessments.
• MIPS modeling, trend analysis, capacity forecasting, utilization reporting, and long-term capacity planning.
• Troubleshooting performance, throughput, response time, and workload management issues in enterprise mainframe environments.
• Supporting disaster recovery, business resiliency, data replication, and hybrid cloud initiatives on AWS and/or Microsoft Azure.
• Writing technical documentation, SOPs, analytical reports, performance studies, and executive recommendations.
  
  

IBM Technologies

CICS, DB2, WebSphere Application Server (Traditional and Liberty), IBM MQ, z/OS Connect, Sysplex, LPARs, Coupling Facilities (CF), multi-CEC environments, and data replication technologies.

Tools and Platforms

• Performance and capacity: RMF/SMF, zPCR, MICS, MXG, SAS, IntelliMagic Vision, BMC Strobe, Dynatrace, Splunk, Ironstream, and z/OS AIOps solutions
• Data and scripting: JCL, IBM Utilities, SQL, Oracle/DB2 databases, data analytics and reporting platforms
• Programming (working knowledge): C , Java, JavaScript, HTML, SQL, and object-oriented concepts
• Microsoft Office: Teams, Outlook, Word, Excel, PowerPoint, SharePoint, Visio, Access
  
  

Soft Skills

Strong written and verbal communication.

Preferred Qualifications

• Experience supporting SSA or other Federal agencies.
• Experience with large-scale mainframe modernization initiatives.
• Cloud integration and hybrid cloud architecture experience.
• SharePoint administration experience.
• Creating architecture, workflow, systems, and process diagrams in Visio.