Mainframe Developer

• Develop and maintain COBOL, REXX, JCL, CLIST, CICS, IDMS, and DB2 code and database structures in accordance with client standards and software engineering best practices.
• Use mainframe utilities and diagnostic tools, including SYNCSORT, File-AID, SuperC, Abend-AID, SPUFI, QMF, Xpediter, and InterTest.
• Perform unit testing and validate results against expected outcomes.
• Assess how database schema changes affect existing software components.
• Diagnose and resolve application defects involving COBOL, CICS configurations, IDMS, DB2, business logic, and databases.
• Design, develop, test, debug, and implement modernized solutions for legacy applications using appropriate technologies and engineering practices.
• Create, update, and support JCL for reliable and efficient batch processing.
• Evaluate the effects of new operating systems and COBOL versions on the existing legacy application inventory.
• Collaborate with internal teams, client counterparts, and vendor teams. Provide technical guidance and help stakeholders achieve project and business objectives.
• Communicate status, risks, and technical information clearly to Leidos leads, client counterparts, teams, and vendors at the appropriate level of detail.
• Perform other duties as assigned or directed.

Eight to ten years of experience developing legacy applications on IBM z/OS.

• Hands-on experience developing, debugging, and maintaining COBOL applications that use CICS, DB2, IDMS, copybooks, and CICS maps.
• Hands-on experience with CICS applications, screen development and abends, including interactions between COBOL programs and BMS maps that define the user interface.
• Experience using Endevor or a comparable mainframe software configuration management system to manage legacy element workflows.
• Hands-on experience with ISPF, TSO, JES, z/OS, and mainframe utilities.
• Hands-on experience creating and modifying JCL for job execution, supporting batch jobs in day-to-day operations.
• Experience with Control-M or similar mainframe job-scheduling tool(s).
• Strong requirements elicitation, analytical, technical writing, and communication skills, including the ability to document project requirements and analysis.
• Strong attention to detail and a demonstrated ability to complete repetitive, integration/production-oriented tasks accurately and on time.
• Ability to research problems independently and develop effective solutions.
• Hands-on experience of the legacy technologies listed in job specification.
• Good understanding in SDLC specially in legacy development environment.
• Experience with modern development tools, software, AI tools, and methodologies.
• Familiarity with Agile frameworks, Agile terminology and Agile practices.

Relevant certification, such as IBM Mainframe Developer Professional, or Interskill - IBM Mainframe Application Programmer, or IBM Mainframe Application Programmer COBOL and IBM Enterprise COBOL for z/OS Programming