Multi-Site Network Security Engineer | Firewall & VPN Expert

Valiant Technologies LLC; New York (NY); On-site; USD 91,000 - 124,000; Full time

Job summary

Valiant Technologies LLC in Liverpool, NY is seeking a Network Security Engineer to design, implement, and manage enterprise‑class network security across multiple sites. You will maintain firewalls, routing and switching, VPNs, monitoring tools, and documentation to safeguard systems.

Candidates should have 3+ years of hands‑on experience with Cisco IOS, network hardware installation, vulnerability assessments, and remote datacenter support.

Qualifications

• 3+ years of hands-on network engineering/security experience with strong knowledge of firewalls, routers, switches, TCP/IP, VPNs, DNS, DHCP, SNMP, load balancing, and network troubleshooting.
• US work authorization: US Citizen, Green Card, H-1B, OPT-EAD, CPT, Other as applicable.

Responsibilities

• Manage and maintain enterprise-grade firewalls.
• Configure and troubleshoot routing and switching infrastructure.
• Support multi-site network environments and remote datacenters.
• Perform vulnerability assessments and remediation activities.
• Maintain patching, backups, monitoring, and network security tools.
• Participate in 24x7 on-call rotation.
• Create and maintain network diagrams and documentation.
• Travel up to 25% to support sites and infrastructure projects.

Skills

Network security engineering

Firewall administration

Routing & switching

Network infrastructure

Vulnerability assessments

Network monitoring

Backups & recovery

Rack & stack

Cisco IOS upgrades

Microsoft Visio

Remote site support

NERC CIP experience

Job description

Valiant Technologies LLC in Liverpool, NY is seeking a Network Security Engineer to design, implement, and manage enterprise‑class network security across multiple sites. You will maintain firewalls, routing and switching, VPNs, monitoring tools, and documentation to safeguard systems.

Candidates should have 3+ years of hands‑on experience with Cisco IOS, network hardware installation, vulnerability assessments, and remote datacenter support.