A network controller, also known as a network control operator or network control technician, is a tech specialist who monitors the overall engineering infrastructure of an organization. They continuously plan, design, and evaluate to ensure network performance is not compromised. The main job of a network control operator is to maintain the network through keeping a close eye on the performance of the network as well as manages issues through routine troubleshooting. If the problems lie within a complex network, they do advanced troubleshooting. They work closely with an engineering team to provide network architecture design and recommend new technologies to enhance current performance.
https://www.fieldengineer.com/skills/what-is-a-network-controller-2/