Senior Mainframe Performance Engineer

Cloud Analytics Technologies, LLC; Alpharetta (GA); On-site; USD 120,000 - 180,000; Full time

Job summary

Cloud Analytics Technologies, LLC in Alpharetta, GA seeks a senior mainframe performance analyst to monitor z/OS health, tune RMF/WLM, and lead capacity planning. You will analyze data, forecast demand, and drive improvements across production systems.

You will collaborate with operations, development, and infrastructure teams, providing guidance and quick responses to incidents. A strong background in JCL, DB2, and Python/REXX is essential.

Qualifications

• Bachelor’s degree in information systems, mathematics, finance or related field.
• 12+ years of mainframe systems experience with proficiency in performance management for large, multi-processor, multi-LPAR, Parallel Sysplex environments utilizing z/OS.
• Proven experience in mainframe performance monitoring, observability, capacity management, and data analysis.
• Proven experience resolving systems performance problems in real-time via adjustments to WLM and batch initiators.
• Basic understanding of PR/SM.
• Proficiency in Job Control Language (JCL) & DB2
• Proficiency in REXX/Python (plus)
• Advanced user of MS Excel (Charts, Pivot tables, Vlookups, PowerPivot) and PowerPoint for data visualization.
• Experience with mainframe monitoring tools and performance tuning techniques.
• Experience working with large highly transactional datasets to draw insights and create organizational value.
• Experience with DevOps is a plus

Responsibilities

• Monitor real-time z/OS system health and performance across CPU, memory, DASD, and WLM-managed workloads.
• Analyze performance data to identify trends, bottlenecks, and potential issues.
• Detect, troubleshoot, and resolve resource anomalies, workload misbehaviors, and degradation risks in production systems.
• Partner with incident response teams to resolve performance issues quickly and accurately.
• Develop and implement performance tuning strategies by recommending changes to service definitions, dispatching priorities, and workload placement.
• Contribute to capacity planning by forecasting and modeling workload resource demand & capacity requirements.
• Support cost modeling, vendor reporting (SCRT), infrastructure sizing and resource optimization efforts.
• Collect and analyze system performance data to generate reports and dashboards.
• Identify key performance indicators (KPIs) and develop metrics to track system performance.
• Visualize, summarize and present data findings, recommendations, and methodology to senior leadership, department leadership and enterprise stakeholders (technical and non-technical stakeholders)
• Work closely with cross-functional teams, including operations, development, and infrastructure teams.
• Provide technical support and guidance to team members and stakeholders.
• Participate in on-call rotations and provide timely responses to performance and observability issues.
• Participate in migration of performance/capacity tooling to Git change management and DevOps deployment pipelines.

Skills

Mainframe performance

RMF/WLM tuning

z/OS knowledge

JCL

DB2

Python/REXX

Data analysis

Excel/Power BI

Education

Bachelor’s degree in information systems or related

Tools

RMF

MICS

DB2

Job description

Cloud Analytics Technologies, LLC in Alpharetta, GA seeks a senior mainframe performance analyst to monitor z/OS health, tune RMF/WLM, and lead capacity planning. You will analyze data, forecast demand, and drive improvements across production systems.

You will collaborate with operations, development, and infrastructure teams, providing guidance and quick responses to incidents. A strong background in JCL, DB2, and Python/REXX is essential.