Building and designing the ISP infrastructure. Administrating Linux-based Firewalls with advanced routing and traffic control. Administrating Linux-based Monitoring Systems & Monitor system performance. Administrating Linux-based Backup Systems. Administrating Linux-based Squid and HAProxy Systems. Administrating Windows Virtualization System. Responsible for cabling and network infrastructure. Quickly arrange repairs for hardware in occasion of hardware failure. Training Junior System Administrators. Providing full documentation for servers and services.