Mainframe Application Developer COBOL / DB2 / JCL
Location: Chicago, IL Area
Work Arrangement: Hybrid
Employment Type: W2 Only
Rate: Depends on Experience
Experience: 5+ Years
Availability: Immediate / Short Notice Preferred
Job Overview
We are seeking an experienced Mainframe Application Developer to support enterprise applications within an IBM z/OS environment.
The ideal candidate will have strong hands-on experience with COBOL, JCL, DB2, IMS, VSAM, CICS, and TSO/ISPF. This position involves application development, enhancement, testing, debugging, production support, and troubleshooting in a large-scale Mainframe environment.
Key Responsibilities
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Develop, enhance, maintain, test, and debug Mainframe applications.
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Design and implement application solutions based on business and technical requirements.
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Develop and maintain COBOL programs and related Mainframe components.
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Create, modify, execute, and troubleshoot JCL and batch jobs.
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Work with DB2 and IMS/DB databases.
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Develop and support online applications using CICS and/or IMS/DC.
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Work with VSAM files and datasets.
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Perform application testing, debugging, code validation, and implementation activities.
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Troubleshoot application issues, batch failures, and production incidents.
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Perform root-cause analysis and assist with production issue resolution.
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Monitor and improve application and batch-processing performance.
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Maintain technical documentation related to application changes and support activities.
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Collaborate with development, QA, database, infrastructure, and business teams.
Required Skills
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5+ years of professional experience in Mainframe Application Development.
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Strong hands-on experience with COBOL.
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Strong experience with JCL and Mainframe batch processing.
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Experience working in IBM z/OS environments.
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Hands-on experience with DB2.
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Experience with IMS/DB.
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Experience with VSAM.
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Experience with CICS and/or IMS/DC.
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Working knowledge of TSO/ISPF.
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Strong debugging, troubleshooting, and problem-solving skills.
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Experience supporting enterprise production applications.
Preferred Skills
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Experience with REXX.
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Exposure to PL/I or Assembler.
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Experience with large-scale enterprise Mainframe applications.
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Experience with both batch and online transaction processing.
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Familiarity with enterprise development, testing, release, and change-management processes.
Candidate Profile
We are looking for a hands-on Mainframe Developer who can work across the application lifecycle, including development, testing, debugging, production support, and issue resolution.
Candidates with strong experience in COBOL, JCL, DB2, CICS/IMS, z/OS, and VSAM are encouraged to apply.
Work Location
Chicago, IL Area Hybrid
Candidates located in the Chicago metropolitan area or within reasonable commuting distance are preferred.
Employment
W2 Only
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