Senior Mainframe Developer — Washington DC-Baltimore Area

Some of the most important systems in federal government still run on COBOL, and they process benefits for millions of Americans every day. We’re looking for a Senior Mainframe Developer to keep those applications reliable, fix what breaks and help modernize them for what comes next. You’ll work hands on in COBOL, CICS, IDMS, DB2 and JCL on IBM z/OS as part of a large federal program.

What You Will Do

• Develop and maintain COBOL, CICS, IDMS and DB2 programs and database structures on IBM z/OS

• Build new CICS online screens with BMS maps and the COBOL programs behind them

• Diagnose and resolve production defects across COBOL logic, CICS configuration, IDMS and DB2

• Create and maintain JCL for batch processing, and support scheduled jobs in daily operations

• Assess how schema changes, new z/OS releases and new COBOL versions affect existing applications

• Unit test changes and validate results against expected outcomes

• Help design and deliver modernized solutions for legacy applications

• Communicate status, risks and technical detail clearly to technical leads, client teams and vendors

Required

• Master’s degree with 5+ years of experience, Bachelor’s degree with 7+ years, or 13+ years of experience in lieu of a degree

• 8 to 10 years developing legacy applications on IBM z/OS

• Hands on COBOL development and debugging with CICS, DB2, IDMS, copybooks and BMS maps

• CICS screen development and abend resolution

• Creating and modifying JCL for batch job execution

• ISPF, TSO, JES and mainframe utilities such as File AID, Abend AID, Xpediter, SyncSort, SPUFI and QMF

• Endevor or a comparable source management tool

• Control M or a comparable job scheduler

• Strong requirements analysis, technical writing and communication skills

Preferred

• REXX and CLIST scripting

• InterTest, SuperC and other legacy debugging and compare tools

• Experience with modern development tools, AI tools and Agile practices

• IBM mainframe certification, such as IBM Mainframe Developer Professional or IBM Enterprise COBOL for z/OS

Interested or know someone who would be a strong fit? Reach out directly or apply below. Interviews are being scheduled now.