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# COBOL/JCL/DB2 SME - 26-16457

- **Company:** Compu-Vision Consulting Inc.
- **Location:** St. Louis, MO, United States (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Unit Testing, Microsoft Azure, Batch Processing, C Sharp (Programming Language), COBOL (Programming Language), Static Program Analysis, Data Migration, Data Warehousing, IBM DB2, DB2 SQL, Job Control Language (JCL), Mainframes, Performance Tuning, Systems Development Life Cycle, Regression Testing, SQL Databases, Virtual Storage Access Methods, Z/OS, Indexer
- **Published:** November 12, 2026
- **Apply:** https://www.careerbuilder.com/job-details/cobol-jcl-db2-sme-26-16457-saint-louis-mo--33be9f4f-4c4a-4638-9fd8-71db50dca7a6

## About the Role

IBM DB2, Cobol Programming Language, JCL (Job Control Language), IBM DB2, Mainframe Computer, Cobol Programming Language, IBM z-OS Operating System, JCL (Job Control Language), Data Warehousing, Analysis Skills, * 7+ years of full SDLC, with 7+ years of QA testing.

 * 7+ years each in:
 + COBOL
 + JCL
 + DB2 z/OS with performance tuning
 + SQL
 + Batch processing
 + System/unit testing
 * C# .NET experience (at least integration-level).
 * Azure DevOps (ADO).

Preferred Qualifications:

 * VSAM; payroll and accounting applications on mainframe.
 * Experience with CGI Advantage or another government mainframe ERP.
 * Mainframe modernization or data migration projects.

## Description

Senior mainframe developer and subject-matter expert on a COBOL, JCL, and DB2 z/OS code base supporting a data warehouse modernization program., 1. Analyze existing COBOL programs, JCL job streams, DB2 z/OS tables, and VSAM files feeding the data warehouse.

 2. Extract and document business rules, working with the Business Analyst and using tool-assisted code analysis.
 3. Develop and modify COBOL/JCL programs and DB2 SQL for approved changes and data extracts.
 4. Tune DB2 z/OS performance (EXPLAIN, access paths, indexing) and batch run times.
 5. Unit, system, and regression test mainframe changes; resolve abends and batch failures.
 6. Support reconciliation, parallel runs, cutover, and knowledge transfer to client staff.