11 years of experience in network administration and server management, including maintaining a network of 400 nodes and providing technical support to users. They are proficient in installing and maintaining various systems such as Windows Server 2008, Virtualization ESXI, 3CX, Avaya, Nortel, and Fortinet firewall. The candidate is also experienced in determining network and system requirements, monitoring performance, and troubleshooting issues. They are confident in their ability to maintain the network.