Network engineers also establish, develop, and maintain computer networks between organizations. They need to provide support to all users, including team members and clients and fix any issues that occur. They may also have to design new networks.Engineers provide support for system installation and define, document, and put into effect system standards. They secure network systems by setting up and applying policies, and define and oversees access.Engineers must hold discussions with network customers and resolve present system problems. If required, they would need to replace the defective network hardware .