A Network Engineer is a professional essential to the development, implementation, and maintenance of an organisation's computer networks. Their responsibilities include planning and design, where they select and configure appropriate hardware, software, and protocols to create efficient and scalable network infrastructures. Network Engineer play a critical role in ensuring the seamless and secure flow of data within and between organisations, dealing with local area networks (LANs) within a single office or expansive wide area networks (WANs) connecting multiple locations.

Implementation and configuration are key aspects of a Network Engineer's role, involving the installation and setup of network components like routers, switches, and firewalls.  A Network Engineer must ensure these components work together effectively to enable reliable data transmission. Additionally, Network Engineers also handle troubleshooting and maintenance tasks, monitoring network performance and resolving connectivity issues, performance bottlenecks, and security vulnerabilities for optimal network functionality.