Subcontractor-Cobol developer

Area(s) of responsibility

D for COBOL developer

Required Technical Skills:

• Strong hands-on experience with COBOL development
• Good knowledge of JCL, batch processing, and job scheduling
• Experience working with VSAM / flat files / Oracle DB (or other relational databases)
• Good exposure to mainframe utilities (SORT, IDCAMS, IEBGENER, IEFBR14 etc.)
• Strong understanding of file layouts, copybooks, and data transformations
• Experience performing impact analysis and code remediation
• Proficiency in debugging and resolving issues in large, complex mainframe applications

Additional specific technical skills needed for D0 to F6 conversion:

• Strong experience handling field length changes in legacy mainframe systems during format conversions
• Expertise in analyzing copybook and file layout changes, including increases or decreases in field size
• Ability to identify and remediate field length dependencies across:

o COBOL data definitions (PIC clauses, REDEFINES)

o Database columns (DB2, relational DBs)

o VSAM and flat file records

• Proficient in updating COBOL PIC definitions (alphanumeric and numeric fields) to align with new standard requirements
• Hands-on experience handling numeric vs alphanumeric field conversions caused by length or format changes
• Skilled in managing leading/trailing spaces, zero padding, truncation, and alignment issues
• Experience resolving buffer overruns, data truncation, and record mismatch issues due to field length changes
• Ability to perform impact analysis for field size changes across:

o Input and output interfaces

o Downstream and upstream systems