Administered and optimised enterprise Linux environments for a leading semiconductor chip manufacturer, ensuring high system availability and security. Configured, maintained, and monitored CrushFTP servers to facilitate secure file transfers, achieving 99.9% uptime and compliance with data security standards. Generated and analysed weekly vulnerability reports, proactively resolving 100% of critical issues to maintain system integrity and compliance. Led Oracle JDK upgrades across all on-prem servers, coordinating with cross-functional Unix teams for OS patching using ansible automation, and performing post-deployment validations to minimize downtime.