Cyber network defenders help create computer systems that can handle sensitive data and withstand external cyber threats. They also review networks that already are in place in order to identify potential threats or to respond to immediate threats.
Specific knowledge includes expertise in automated information systems (AIS) security; computer terminal devices; networking theory and concepts, Windows and UNIX operating systems; procedural actions in telecommunications operations such as message formatting, processing incoming/outgoing messages, and service actions; and training on communications security equipment and devices.

• Cyber Network Defender Duties & Responsibilities generally requires the ability to do the following work:
   Implement hardware and software infrastructures
•  Test hardware and software infrastructures
• Assess the general strengths and likely vulnerabilities of networks
•  Analyse specific issues to identify threats or potential threats
• Respond to immediate cyber threats
• Provide detailed reports to review issues or potential issues and solutions or potential solutions