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

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.

• Develop, enhance, maintain, test, and debug Mainframe applications.
• Design and implement application solutions based on business and technical requirements.
• Develop and maintain COBOL programs and related Mainframe components.
• Create, modify, execute, and troubleshoot JCL and batch jobs.
• Work with DB2 and IMS/DB databases.
• Develop and support online applications using CICS and/or IMS/DC.
• Work with VSAM files and datasets.
• Perform application testing, debugging, code validation, and implementation activities.
• Troubleshoot application issues, batch failures, and production incidents.
• Perform root-cause analysis and assist with production issue resolution.
• Monitor and improve application and batch-processing performance.
• Maintain technical documentation related to application changes and support activities.
• Collaborate with development, QA, database, infrastructure, and business teams.

• 5 years of professional experience in Mainframe Application Development.
• Strong hands-on experience with COBOL.
• Strong experience with JCL and Mainframe batch processing.
• Experience working in IBM z/OS environments.
• Hands-on experience with DB2.
• Experience with IMS/DB.
• Experience with VSAM.
• Experience with CICS and/or IMS/DC.
• Working knowledge of TSO/ISPF.
• Strong debugging, troubleshooting, and problem-solving skills.
• Experience supporting enterprise production applications.

• Experience with REXX.
• Exposure to PL/I or Assembler.
• Experience with large-scale enterprise Mainframe applications.
• Experience with both batch and online transaction processing.
• Familiarity with enterprise development, testing, release, and change-management processes.

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.

Chicago, IL Area – Hybrid

Candidates located in the Chicago metropolitan area or within reasonable commuting distance are preferred.

W2 Only