L3 Network Support Engineer Must have an Active SC minimum and be willing to attain their DV. The L3 Network Support Engineer will focus on incident resolution, network stability and supporting complex change within secure systems. This role suits a hands on L3 Network Support Engineer who takes ownership of issues and delivers solutions in high pressure environments. L3 Network Support Engineer Responsibilities Provide Level 3 support across LAN and WAN environments supporting classified systems. Manage incident, problem and defect resolution on live secure networks. Perform installation, configuration, deployment and diagnostics of Cisco network devices and Firewalls . Support onboarding and offboarding of system nodes across multiple classifications . Collaborate with third parties, resolver groups and NATO stakeholders to deliver service changes. Support and advise on network design changes and implementation activities . Maintain and update network design documentation across environments . Configure and manage network cryptographic devices . L3 Network Support Engineer Skills and Experience Strong exper...