Senior Mainframe Systems Engineer

CGI•Baltimore, MD

23h

About The Position

CGI is in the top 5 largest global IT companies spread across 40 countries with endless opportunities to expand and grow. As a Federal CGI Partner, you have the opportunity to be a shareholder at CGI and join a family of 91,000 CGI Partners strong. CGI is seeking a Senior Mainframe Systems Engineer to architect, maintain, and optimize mission-critical z/OS environments supporting federal agency enterprise platforms. This senior role oversees mainframe software installation, SMP/E maintenance, middleware operations, and cross-platform integration while ensuring high availability, performance, and system resilience. This position is located in Baltimore, MD

Requirements

Ability to obtain and maintain Public Trust clearance
Bachelor's degree +14 years of relevant IT experience
Advanced experience administering IBM z/OS at the system engineering level.
Expertise with WebSphere on z/OS, including installation, configuration, and tuning.
Strong SMP/E knowledge and mainframe software lifecycle management skills.
Deep experience with JCL, TSO/ISPF, RACF, JES2/JES3, and common IBM utilities.
Ability to perform advanced debugging, dump analysis, and system performance monitoring.

Nice To Haves

Experience with mainframe modernization or hybrid integration efforts.
Familiarity with REXX, CLIST, or automation frameworks for mainframe operations.
Experience supporting large federal mainframe environments.
Knowledge of mainframe-to-cloud or API-driven modernization strategies.

Responsibilities

Lead installation, configuration, and lifecycle management of z/OS and related IBM mainframe subsystems.
Architect and maintain WebSphere for z/OS, mainframe middleware, and associated system components.
Oversee SMP/E software installation, patching, product upgrades, and maintenance strategy.
Perform advanced z/OS performance tuning, capacity planning, and workload management (WLM).
Manage JES2/JES3 operations, RACF security configurations, system exits, and automation routines.
Troubleshoot complex mainframe incidents, diagnose root causes, and implement long-term corrective actions.
Support integration with distributed applications, API gateways, and modernization toolchains.
Produce detailed architectural documentation, system design packages, and operational standards.
Provide technical leadership to junior engineers and collaborate with cross-functional infrastructure teams.