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Mainframe Developer

Nexylum Global LLCMcLean, VA🇺🇸United StatesPosted Oct 7, 2026

Quick Overview

Seniority
Mid Senior
Work mode
On Site
Location
McLean, VA, United States
Posted
19 hours ago
SQLAgileCOBOL

Job Description

Experience: 10+ Years

Interview: Face-to-Face (F2F)

Work Location: Local candidates preferred / Onsite

Employment: W2 / Contract

Must Have Skills

  • 10+ years of hands-on IBM Mainframe development experience
  • Strong COBOL development experience
  • Strong REXX scripting/development experience
  • Strong JCL
  • Strong DB2 / SQL
  • Hands-on CICS
  • Good knowledge of VSAM
  • Experience with both Batch and Online applications
  • Production support, debugging and abend handling
  • Impact analysis, coding, unit testing and defect resolution
  • Strong understanding of SDLC and Agile methodology

Responsibilities

  • Design, develop, enhance and maintain Mainframe applications using COBOL.
  • Develop and maintain REXX scripts for automation and Mainframe utilities.
  • Analyze requirements and perform impact analysis across COBOL programs, JCL, DB2 and CICS components.
  • Develop and modify batch and online applications.
  • Troubleshoot production issues, abends and data-related problems.
  • Perform root-cause analysis and implement permanent fixes.
  • Write and optimize DB2 SQL queries.
  • Work with VSAM files and Mainframe datasets.
  • Prepare and execute unit/SIT testing.
  • Support UAT and production deployments.
  • Coordinate with business analysts, QA and offshore/onshore teams.
  • Participate in code reviews and technical discussions.
  • Prepare technical documentation and support release activities.

Good to Have

  • IMS DB/DC
  • MQ
  • CA7 / Control-M
  • Easytrieve
  • CLIST
  • Mainframe utilities such as SORT, IDCAMS, IEBGENER
  • Mainframe-to-distributed integrations
  • Banking / Financial Services domain experience
  • Performance tuning / Mainframe optimization

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