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# Senior Mainframe Capacity & Performance Engineer

- **Company:** CGI Group
- **Location:** Baltimore County, MD, United States
- **Experience:** Expert
- **Salary:** $91,800.0 - $180,700.0
- **Contract:** Permanent contract
- **Skills:** Microsoft Access, Microsoft Word, HTML, Java (Programming Language), JavaScript (Programming Language), Microsoft Excel, Agile Methodology, Amazon Web Services, Business Analytics Applications, Microsoft Azure, Microsoft Outlook, C++ (Programming Language), Customer Information Control System (CICS), Databases, System Configuration, IBM DB2, Disaster Recovery, IBM Parallel Sysplex, Job Control Language (JCL), IBM WebSphere MQ, IBM Websphere Application Server, Load Testing, Mainframes, Microsoft Office, Microsoft Visio, Oracle (Applications), Performance Tuning, Microsoft PowerPoint, SAS (Software), Microsoft SharePoint, SQL Databases, Z/OS, HybridCloud, Data Analytics, Performance Monitor, Database Replication, Tools for Reporting, Cloud Integration, Splunk, AIOps, Dynatrace
- **Published:** October 26, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=6df20195a61be54b

## About the Role

Bachelor's degree from an accredited college or university.
. Minimum seven (7) years of experience supporting IBM zSystems mainframe performance engineering, capacity planning, capacity forecasting, and systems performance analysis.
. Must be able to obtain and maintain a Public Trust clearance.
. Experience analyzing, monitoring, and tuning z/OS and zLinux environments.
. Experience conducting application load testing, workload analysis, performance benchmarking, and production readiness assessments.
. Experience performing MIPS modeling, trend analysis, capacity forecasting, resource utilization reporting, and long term capacity planning.
. Experience troubleshooting performance, throughput, response time, and workload management issues across enterprise mainframe environments.
. Experience supporting IBM technologies including 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.
. Experience developing technical documentation, SOPs, analytical reports, performance studies, and executive recommendations.
. Experience with enterprise zSystems performance and capacity management tools, including RMF/SMF, zPCR, MICS, MXG, SAS, IntelliMagic Vision, BMC Strobe, Dynatrace, SPLUNK, Ironstream, and related z/OS AIOps solutions.
. Experience with JCL, IBM Utilities, SQL, Oracle/DB2 databases, and data analytics/reporting platforms.
. Working knowledge of C++, Java, JavaScript, HTML, SQL, and object oriented programming concepts in support of performance analysis, reporting, and automation activities.
. Experience supporting disaster recovery, business resiliency, data replication, and hybrid cloud initiatives utilizing AWS and/or Microsoft Azure.
. Proficiency with Microsoft Office Suite, including Teams, Outlook, Word, Excel, PowerPoint, SharePoint, Visio, and Access.
. Strong written and verbal communication skills with the ability t

Desired qualifications/non essential skills required:
. Experience supporting the Social Security Administration (SSA) or other Federal agencies.
. Experience supporting large scale mainframe modernization initiatives.
. Experience with cloud integration and hybrid cloud architectures.
. SharePoint Administration experience.
. Experience creating technical architecture, workflow, systems, and operational process diagrams using Visio., * Azure

 * CICS
 * Data Analysis
 * Java
 * Linux
 * Mainframe
 * MS Office365

## Description

CGI Federal is seeking a Senior Mainframe Capacity & Performance Engineer to support the Social Security Administration (SSA), Division of Mainframe Systems Software (MSS), Mainframe Capacity & Performance Branch (MCPB). This role provides technical expertise in mainframe performance engineering, capacity planning, workload management, systems optimization, and performance analysis across SSA's enterprise IBM zSystems environment., Monitor, analyze, and optimize performance across IBM zSystems mainframe environments.
. Conduct mainframe capacity planning, workload forecasting, resource utilization analysis, and long range capacity projections.
. Perform application load testing and assess production readiness based on CPU, memory, throughput, and workload metrics.
. Conduct capacity and performance assessments for SSA production and integration environments, including before and after testing comparisons.
. Analyze application and infrastructure performance to identify bottlenecks, performance risks, and resource constraints.
. Support performance engineering efforts for CICS, DB2, z/OS Connect, WebSphere Application Server (Traditional and Liberty), and IBM MQ environments.
. Develop performance reports, trend analyses, capacity forecasts, and executive recommendations.
. Conduct real time Sysplex, LPAR, and CEC performance monitoring, root cause analysis, and performance tuning activities.
. Perform MIPS forecasting and capacity projections utilizing IBM zPCR and z/OS AIOps toolsets.
. Develop and maintain automated SAS based reporting and analytics solutions for mainframe resource utilization, trending, forecasting, and performance analysis.
. Create and maintain technical documentation, standard operating procedures (SOPs), technical diagrams, and knowledge repositories.
. Support business resiliency, disaster recovery, data replication, and hybrid cloud initiatives.
. Participate in SSA modernization efforts, proof of concept testing, emerging technology evaluations, Agile development activities, and continuous improvement initiatives.
. Provide system configuration recommendations to improve performance, availability, scalability, and operational efficiency.
. Support after hours troubleshooting and performance problem determination activities as required.