z os , smp e , Vsam, Ispf, Backup, Rexx, Automation Tools, Tls, Restore, Performance Tuning, Digital Certificates, SSL, Tso, High Availability, JCL, Racf, VTAM, SNA, Shared Queues, CICS TS for z OS, Disaster Recovery, IBM MQ on z OS, Pub Sub, Coupling Facility, MQ security, CA SYSVIEW, zHyperWrite, Mainframe knowledge, Queue Managers, Channels, queues, Troubleshooting, OMVS