Responsibilities include maintaining, installing, updating, and securing network environments, working with technologies such as Cisco IOS, Cisco Routers, Layer 2 and Access Layer Switches, Cisco ISE, Firepower, ACI, F5, Palo Alto, VMware NSX, SPLUNK, ACAS, and ServiceNow. The engineer assists in planning and executing network improvements and upgrades, providing essential documentation for project continuity and compliance with DISA Security Technical Implementation Guide (STIG) validations.