Job Summary: Ensure the stability, security, and availability of the company's IT infrastructure, supporting business operations through administration and optimization. Key Responsibilities: 1. Administer, monitor, and optimize servers, networks, and storage systems. 2. Implement and monitor IT security policies. 3. Analyze and resolve critical infrastructure incidents. Ensure the stability, security, and availability of the company's IT infrastructure—including servers, networks, storage systems, and information security—to provide necessary support for business operations. * Administer, monitor, and optimize servers, networks, storage systems, and security. * Manage and maintain backup and disaster recovery policies. * Implement and monitor security policies, including firewall, antivirus, and access control. * Ensure the availability and performance of IT services. * Support infrastructure expansion and modernization projects. * Document infrastructure topologies, procedures, and configurations. * Perform updates, preventive and corrective maintenance in physical and virtual environments. * Analyze and resolve critical infrastructure-related incidents.