The junior network support engineer role involves providing both remote and on-site technical support to clients, responding to customer calls and emails, and logging and resolving tickets. Key responsibilities include troubleshooting hardware and software issues, building and configuring various devices, and configuring networking equipment such as routers, switches, and firewalls. The ideal candidate will have skills in various Windows operating systems, servers, networking protocols, security devices, virtualization, messaging platforms, directories, and other Microsoft applications.