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# Mainframe Developer- Programmer

- **Company:** Excelraise, LLC
- **Location:** United States
- **Experience:** Experienced
- **Contract:** Contract
- **Skills:** Java (Programming Language), Accounting Systems, Adaptable Database Systems, COBOL (Programming Language), Data Stores, Software Debugging, Eclipse (Software), Data Flow Control, Job Control Language (JCL), Rexx (Programming Language), Systems Analysis, Integrated Development Environments, Python (Programming Language), Mainframes, Microsoft Office, Regression Testing, Test Data, Virtual Storage Access Methods, Z/OS, Tso/ispf, Information Technology
- **Published:** November 3, 2026
- **Apply:** https://www.dice.com/job-detail/923876db-c670-4d8b-8129-58c3d1b14ba3

## About the Role

* Enterprise COBOL development in a z/OS environment: 5+ Years
 * NaturalOne experience: 5+ Years
 * JCL development and production support: 5+ Years
 * Financial/accounting systems development or support: 3+ Years
 * Experience working with Adabas and VSAM: 3+ Years
 * Tracing undocumented logic through copybooks, call chains, and job streams: 3+ Years

<>Preferred Skills

 * Cash management, account pooling, sweeps, or treasury applications: Preferred
 * CA-7 scheduling and batch operations: Preferred
 * REXX, Python, or Java: Preferred, * Ability to take a specification from analysis through production implementation with limited supervision.
 * Strong written communication skills, including explaining technical changes to auditors, business analysts, and developers.
 * Bachelor's degree in Computer Science or a related field, or equivalent practical experience.

## Description

The South Carolina State Treasurer's Office is seeking an experienced Mainframe Developer to build a new Composite Reservoir Account (CRA) structure within an existing z/OS core accounting system without disrupting current account balances. The role involves analyzing and extending a large, established COBOL production system to support the new account type, including posting, settlement, accruals, reporting, and reconciliation. Accuracy, traceability, and financial integrity are critical., * Analyze existing account master, posting, and balance-maintenance programs to identify where composite reservoir accounts must be incorporated.

 * Design and develop the new account type, including master file structures, account opening and closing, participant linkage, sweep/reverse-sweep logic, allocation, interest apportionment, and closing balance calculations.
 * Modify batch COBOL programs and JCL and extend nightly and month-end processing cycles.
 * Implement audit trails, exception reporting, and reconciliation controls.
 * Develop test data, unit and regression test packs, and parallel-run comparisons against production output.
 * Support implementation, account conversion, and early-life production runs, including on-call support during initial cycles.
 * Prepare program documentation, data-flow notes, and runbook updates., * COBOL: Strong production experience with Enterprise COBOL on z/OS, including batch and online development, extending large existing programs, and understanding legacy code.
 * NaturalOne: Experience using the Eclipse-based Software AG development environment to develop, debug, and deploy Natural applications.
 * Natural and Adabas: Natural programs, subprograms, maps, DDMs, descriptors, superdescriptors, and Adabas file design and performance.
 * z/OS and JCL: Writing and debugging JCL, procedures, GDGs, utilities, SORT, restart/rerun handling, and TSO/ISPF.
 * Mainframe Data Stores: VSAM file design and access, and Adabas for z/OS.
 * Financial Accounting Logic: Double-entry posting, balance and accrual maintenance, value dating, reconciliation, and month-end close in a regulated environment.
 * Legacy System Analysis: Tracing undocumented logic through copybooks, call chains, and job streams and identifying the impact of proposed changes.