Robust hands-on IBM z/VSE production support (L2/L3).
VSE JCL: job setup, dependency handling, reruns/restarts, checkpoint/restart patterns.
VSE/POWER: spool/queue/output management and troubleshooting.
Batch operations: abend analysis, recovery steps, controlled data fixes/reprocessing.
Online support: CICS on z/VSE (region/transaction troubleshooting and recovery).
Data/files: VSAM concepts (KSDS/ESDS/RRDS), space/extend issues, integrity/reconciliation troubleshooting.
VSEn / VSE Navigator (as used): operational visibility, monitoring, and administration.
Connectivity/interfaces: TCP/IP troubleshooting, FTP/SFTP flows, file-based integrations, rerun/replay controls and reconciliation.
ITIL discipline: incident/problem/change management and strong RCA writing.
Development / Enhancement Skills (Required or Strongly Preferred)
COBOL (or equivalent) for debugging, minor-to-medium enhancements, and production fixes.
Robust testing and release support in controlled settings (segregation of duties, approvals, evidence).