A network manager makes sure that all components of the company's computer network are working correctly. The job usually requires working during non-business hours. Computers do not only break at any time of the night and day and night, but there are also upgrades to software and hardware as well as other kinds of modifications to infrastructure that generally have to be completed in non-business hours so that the workflow won't be disrupted. Certain companies offer compensation time to compensate for the odd hours, however other companies don't.
Network managers typically need at least a bachelor's level in a related field to computer science and a few years of experience. Some companies will take more experience instead of a degree, however not all of them will. Additionally, a network manager must be certified with respect to the kinds of hardware and software employed by the firm. Cisco, Nortel, SAP and Microsoft are among the most commonly used certifications.