Senior Mainframe Developer

We are seeking a Senior Mainframe Developer to develop, maintain, and modernize legacy applications on IBM z/OS. Key skills include mainframe development, COBOL, CICS, JCL, IDMS, and DB2.

The developer works across COBOL, REXX, JCL, CLIST, CICS, IDMS, and DB2 code and database structures, diagnoses and resolves application defects, and designs modernized solutions for legacy applications. The role also involves collaborating with internal teams, client counterparts, and vendor teams, providing technical guidance, and communicating status and risks clearly.

1.     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.

2.     Use mainframe utilities and diagnostic tools, including SYNCSORT, File-AID, SuperC, Abend-AID, SPUFI, QMF, Xpediter, and InterTest.

3.     Perform unit testing and validate results against expected outcomes.

4.     Assess how database schema changes affect existing software components.

5.     Diagnose and resolve application defects involving COBOL, CICS configurations, IDMS, DB2, business logic, and databases.

6.     Design, develop, test, debug, and implement modernized solutions for legacy applications using appropriate technologies and engineering practices.

7.     Create, update, and support JCL for reliable and efficient batch processing.

8.     Evaluate the effects of new operating systems and COBOL versions on the existing legacy application inventory.

9.     Collaborate with internal teams, client counterparts, and vendor teams. Provide technical guidance and help stakeholders achieve project and business objectives.

10.   Communicate status, risks, and technical information clearly to project leads, client counterparts, teams, and vendors at the appropriate level of detail.

11.   Perform other duties as assigned or directed.

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

2.     Master's degree and 5+ years of experience, Bachelor's degree and 7+ years of experience, or 13+ years of experience in lieu of a degree.

3.     Must be able to obtain and maintain a Public Trust clearance.

4.     Must be willing to work onsite in Woodlawn, MD, 5 days a week.

•       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 with the legacy technologies listed in this description

•       Good understanding of the SDLC, especially in a legacy development environment

•       Experience with modern development tools, software, AI tools, and methodologies

•       Familiarity with Agile frameworks, terminology, and practices

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