Data Network Engineer shall be responsible for network, including the local area network (LAN), wide area network (WAN), and internet system. Their duties may include:  Installing, configuring, and supporting: Installing, configuring, and supporting the network and its hardware and equipment, such as routers, switches, firewalls, and servers  Troubleshooting: Troubleshooting network problems and outages, and providing technical support to resolve issues  Upgrading: Upgrading networks and s