> Markdown version of [/jobs/ext/3943313-mainframe-systems-analyst-interface-documentation-specialist](https://www.wearedevelopers.com/jobs/ext/3943313-mainframe-systems-analyst-interface-documentation-specialist). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Mainframe Systems Analyst / Interface & Documentation Specialist

- **Company:** Computer Task Group, Inc
- **Location:** United States (Remote available)
- **Salary:** $143,520.0 - $153,920.0
- **Contract:** Permanent contract
- **Skills:** Batch Processing, Customer Information Control System (CICS), COBOL (Programming Language), Information Systems, Data Integration, Extract Transform Load (ETL), Data Mapping, Data Transformation, IBM DB2, Data-Flow Analysis, Data Flow Control, Job Control Language (JCL), Systems Analysis, Intrusion Detection Systems, Mainframes, Data Streaming, System Testing, Virtual Storage Access Methods, Information Technology, Legacy Systems
- **Published:** October 26, 2026
- **Apply:** https://www.careerbuilder.com/job-details/mainframe-systems-analyst-interface-documentation-specialist--2fe2b1fb-82ce-45f1-a6c4-835463dcee96

## About the Role

Mainframe Computer, Systems Analysis, Documentation, Systems Analysis, Mainframe Computer, Documentation, Analysis Skills, Process Flow, Data Quality, System Validation, * Strong hands-on knowledge of COBOL, CICS, DB2, JCL, VSAM, copybooks, and mainframe file layouts.

 * Experience with Systematics RM, Systematics IM, Systematics IT, Systematics GN, and Systematics AIS.
 * Strong understanding of mainframe interfaces, data integration, batch processing, and application dependencies.
 * Proficiency in source-to-target data mapping, data-flow analysis, and technical documentation.
 * Excellent analytical, troubleshooting, and problem-solving skills, with exceptional attention to detail.
 * Ability to independently trace and validate technical information rather than relying solely on existing documentation.
 * Strong written and verbal communication skills, including the ability to translate complex technical concepts for technical and business audiences.
 * Ability to collaborate with system owners and SMEs to resolve questions and address documentation gaps.

Experience:

 * Demonstrated experience analyzing complex mainframe applications, interfaces, and end-to-end data flows.
 * Hands-on experience tracing batch jobs, files, reports, and dependencies across multiple systems.
 * Experience validating file-level source-to-target mappings, including data elements, offsets, lengths, and transformations.
 * Proven ability to create accurate technical diagrams, interface inventories, process documentation, and reusable technical artifacts.
 * Experience investigating legacy systems, identifying inconsistencies, and validating undocumented or outdated processes.
 * Ability to work independently, manage detailed documentation deliverables, incorporate review feedback, and collaborate effectively with cross-functional stakeholders.

Education:

 * Bachelor's degree in Computer Science, Information Systems, or a related field preferred, or equivalent relevant technical experience.

Excellent verbal and written English communication skills and the ability to interact professionally with a diverse group are required.

## Description

CTG is seeking to fill a Mainframe Systems Analyst / Interface & Documentation Specialist position for our client., * Analyze complex mainframe interfaces, data flows, batch processes, and system dependencies across multiple applications.

 * Develop and independently validate source-to-target data mappings, including file layouts, element IDs, offsets, lengths, and data transformations.
 * Create and maintain interface inventories documenting file and record layouts, processing schedules, application dependencies, system owners, and subject matter experts (SMEs).
 * Trace files, batch jobs, reports, and processing flows across systems to validate data movement and investigate discrepancies.
 * Develop data-flow diagrams, process diagrams, batch/job/file traceability documentation, interface specifications, and technical process summaries.
 * Review existing documentation, identify gaps or inconsistencies, and validate findings with business owners, SMEs, and technical teams.
 * Document unresolved questions, assumptions, and dependencies while working with stakeholders to clarify incomplete or outdated information.
 * Create and maintain reusable technical documentation, including source-to-target mappings, process documentation, PBIs, and supporting artifacts.
 * Incorporate review feedback, maintain version-controlled deliverables, and conduct documentation walkthroughs to ensure established acceptance criteria are met.