Mohamed Osman

System Administrator with 6+ years of experience securing, operating, and hardening Linux-based production infrastructures. My primary focus is defensive security engineering within live environments, particularly Ubuntu servers hosting e-commerce platforms.

I design and maintain containerized workloads using Docker, enforce strict network controls with UFW and CSF, and implement intrusion prevention mechanisms through Fail2Ban. I deploy and tune Wazuh and Suricata for threat detection and log analysis, with emphasis on rule optimization, false-positive reduction, and signal-to-noise improvement. My work centers on actionable telemetry, controlled exposure surfaces, and layered defense.

I manage multi-server environments with disciplined backup strategies using rsync and cron, ensuring integrity, availability, and recoverability. I routinely audit services, minimize attack surfaces, enforce least-privilege principles, and monitor system performance at the process and network level.

Alongside infrastructure security, I support and customize CS-Cart e-commerce platforms using PHP, JavaScript, and MySQL, applying secure configuration practices at the application layer.

My methodology is security-first: hardened configurations, monitored assets, controlled change management, and continuous risk reduction across the stack.