Erickson Cristal

Served as a first-line contact for hardware troubleshooting, performing installation, maintenance, and decommissioning of data center components to support operational uptime. Conducted root cause analysis for emergent issues, contributed to disaster recovery planning, and led workplace safety compliance as Safety Lead.

Provided 24x7 production support for 120+ Mainframe, Distributed, and iSeries applications, covering ~12 million batch runs per month while meeting SLA requirements. Managed batch scheduling with TWS/d and TWS/z, resolved production incidents, and ran end-to-end ITSM workflows in ServiceNow with a 100% completion rate.

Managed batch job scheduling across midrange and mainframe systems using CA Workload Automation (ESP) to ensure timely completion within agreed SLAs. Troubleshot job failures and performance issues, maintained runbooks and operational documentation, and executed change management within maintenance windows.

Processed and governed change requests by supporting change control and scheduling activities in accordance with established procedures. Performed quality assurance on change records, assessed risk and technical feasibility, and handled approval/issue deferral for production and testing environments.

Performed change management and production transfers to ensure job accuracy, completeness, and correct operation. Monitored batch processing and operational exceptions, fine-tuned open system databases and VSAM files, and maintained production statistics reporting.

Operated tape management systems to maintain control and security of tapes and cartridges by verifying, updating, and deleting tape catalog data. Labeled and coded new tapes and generated tape library reports based on retention and creation details.

Bachelor of Science in Information Technology with a major in Database Administration at Colegio de San Juan de Letran from 2004 to 2009.