Vsam, CICS, Rexx, Debugging, automation, Cobol, Endeavor, Ims, DB2, JCL, next-generation engineering practices, Mainframe Modernization, change management tooling, Mainframe Application Design Development, TWS scheduling, DB2 Platinum, File-Aid, z OS Connect, DevOps practices, automated delivery pipelines, engineering enablement, API enablement, Stored Procedures, DevOps-driven delivery, performance optimization, Abend-Aid, DB DC