Role - Mainframe Support Analyst
Location : San Bernardino, CA (onsite)
Years of experience required: 10+
Role Summary
The Mainframe Support Analyst will provide L2/L3 technical support for IBM z/OS mainframe applications, ensuring stability, performance, and timely resolution of incidents across non-production and production environments. The role is critical for batch operations, DB2 support, deployment activities, and root-cause analysis, particularly in large retail and supply-chain transformation programs.
Key Responsibilities
Mainframe Application & Production Support (L2/L3)
· Provide end-to-end support for mainframe applications running on IBM z/OS.
· Analyze and resolve incidents related to JCL abends, DB2 errors, data issues, and code defects.
· Perform root-cause analysis by reviewing COBOL, DB2 programs, and batch execution logs.
· Support production and non-production environments, ensuring SLA adherence.
Batch Processing & Deployment
· Build and maintain batch jobs by copying and parameterizing JCLs across environments.
· Schedule, automate, and monitor end-to-end batch cycles.
· Resolve batch failures and performance issues.
· Support code promotion and deployment activities across test and production environments.
· Manage dataset setup, environment parameterization, and deployment prerequisites.
DB2 DBA & Data Support
· Perform DB2 L2/L3 support activities including:
o Creation, alteration, and maintenance of DB2 objects.
o Plan and package creation, binding, and rebinding.
o DB2 utilities such as UNLOAD, LOAD, RUNSTATS, and REORG.
· Coordinate with RACF/security teams to ensure proper DB2 access and controls.
· Perform DB2 backups, restores, and image copy management to support testing needs.
CICS, MQ & File Transfers
· Support CICS applications by navigating screens and analyzing logs.
· Understand and troubleshoot MQ message flows and integrations.
· Manage Connect: Direct file transfers between systems and support batch file movements.
Automation & Continuous Improvement
· Analyze and enhance existing REXX scripts for automation.
· Identify opportunities to automate repetitive support tasks (batch scheduling, deployments, retrofits).
· Support environment retrofits such as DB2 structural changes, static data updates, and package rebinds.
Required Skills & Experience
· Mainframe Technologies: IBM z/OS, COBOL, JCL
· Databases: DB2 (L2/L3 support, utilities, performance tuning basics)
· Middleware: CICS, IBM MQ (working knowledge)
· Batch & Scheduling: CA-7 / ESP or equivalent schedulers
· Automation: REXX scripting
· Security: RACF (working knowledge)
· Experience: 5–10+ years in Mainframe Application Support / Operations
· Domain: Retail / Supply Chain experience is strongly preferred
Nice to Have
· Experience supporting large retail transformation or supply-chain modernization programs
· Exposure to mainframe modernization or automation initiatives
· Strong documentation and SOP creation skills
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