A network engineer is a professional responsible for designing, implementing, and maintaining computer networks. These networks can include local area networks (LANs), wide area networks (WANs), and cloud networks. Their work ensures that data can be transmitted efficiently and securely between devices, such as computers and servers. Network engineers also troubleshoot network issues and optimize performance. They often work with various technologies, including routers, switches, and firewalls. Additionally, they may collaborate with other IT professionals to ensure that the network supports the needs of the organization and its users, enhancing overall productivity and connectivity.