✦ Luna Orbit — Software Engineering

Mainframe Senior Developer

at Northern Trust

📍 Chicago, IL Unknown 💰 $99K – $169K USD / year Posted March 13, 2026
Salary $99K – $169K USD / year
Type Not Specified
Experience senior
Exp. Years 15+ years
Education Bachelor's Degree in Computer Science, Information Management, or related field
Category Software Engineering

This role involves supporting and modernizing mainframe systems, including installation, maintenance, and upgrades within a financial services environment.

  • Maintain mainframe systems
  • Support upgrades
  • Modernize legacy architecture
  • Troubleshoot system issues
  • Ensure system stability

Focus on mainframe systems, z/OS, DB2, COBOL, PL/1, Assembler, JCL, CICS, and related utilities for enterprise mainframe operations.

The ideal candidate is a highly experienced mainframe developer with over 15 years of expertise in z/OS, COBOL, PL/1, and CICS, capable of supporting and modernizing legacy systems within a financial institution's mainframe environment.

IBM mainframe experienceJCLDB2COBOLPL/1AssemblerCICSExperience with system software upgradesSupport SDLC and Agile methodologiesStrong SQL skillsExperience with IBM utilities
GitHubIDz (IBM Developer for z/OS)FileAidQMFSPUFIDFSORT
z/OSIBM utilitiesFileAidQMFSPUFIDFSORTGitHubIDz
Mainframez/OSDB2COBOLPL/1AssemblerJCLCICSIBM utilitiesFileAidQMFSPUFIDFSORTVersion control
Mainframez/OSDB2COBOLPL/1AssemblerJCLCICSIBM utilitiesFileAidQMFSPUFIDFSORTVersion control
CommunicationTroubleshootingDocumentationTeamworkProblem-solvingAdaptability
Industry Finance
Job Function Mainframe Senior Developer
Mainframez/OSDB2COBOLPL/1AssemblerJCLCICSIBM utilitiesFileAidQMFSPUFIDFSORTVersion controlMainframe Senior DeveloperSystem software upgradesSupport SDLCAgile methodologiesSQLIBM Developer for z/OS

Less than 15 years of mainframe experience, Lack of COBOL or PL/1 skills, No experience with CICS or DB2, Unable to work in a mainframe environment

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