RIVA Solutions seeks a Network & Computer Systems Engineer (Firewall Engineer) to support secure, enterprise network operations for a Federal customer. The role focuses on LAN/WAN, firewall, access control, wireless, load-balancing, and endpoint management. Remote-first environment with opportunities to influence security posture. The idóneo candidate has hands-on experience with Palo Alto firewalls, ISE NAC, F5, Splunk, and endpoint management tools.