Senior Network Engineer - Secure, High-Availability WAN/LAN

VTG Defense; McLean (VA); On-site; USD 120,000 - 150,000; Full time

Job summary

VTG Defense in McLean, VA seeks a Network Engineer with 5+ years of experience to design, implement, and support enterprise network infrastructure.

You will configure routers, switches, firewalls, load balancers, and VPNs; monitor performance, security, and capacity; troubleshoot outages; and maintain documentation. A Bachelor’s degree is required; TS/SCI with Polygraph is preferred for sensitive missions. Collaboration with systems, cloud, and security teams is essential.

Qualifications

• Bachelor's degree in computer science, software engineering, or related field.
• 5+ years of experience in network engineering or network administration.
• Active TS/SCI with Polygraph required.
• Strong knowledge of networking fundamentals (TCP/IP, DNS, DHCP, VLANs, routing protocols such as OSPF, BGP).
• Hands-on experience with network hardware (Cisco, Juniper, Arista).
• Experience configuring and managing firewalls (Palo Alto, Fortinet, Cisco ASA).
• Familiarity with VPN technologies (IPSec, SSL VPN).
• Experience with network monitoring and troubleshooting tools (SolarWinds, Wireshark).
• Strong understanding of network security principles.
• Proficiency with Linux/Unix systems and basic scripting (Python, Bash).

Responsibilities

• Design, implement, and maintain LAN/WAN network infrastructure.
• Configure and manage routers, switches, firewalls, and load balancers.
• Monitor network performance, availability, and capacity; identify and resolve issues proactively.
• Troubleshoot network outages and performance bottlenecks across multiple environments.
• Implement and maintain network security controls, including firewalls, VPNs, and access controls.
• Support network upgrades, patches, and infrastructure improvements.
• Collaborate with systems, cloud, and security teams to support business and technical requirements.
• Maintain network documentation, diagrams, and standard operating procedures.
• Ensure compliance with organizational policies and industry best practices.

Skills

TCP/IP

DNS

DHCP

VLANs

OSPF

BGP

Routers/Switches

VPNs

Security

Linux/Unix

Python

Education

Bachelor's degree in CS/Engineering

Tools

Cisco

Juniper

Arista

Palo Alto

Fortinet

Job description

VTG Defense in McLean, VA seeks a Network Engineer with 5+ years of experience to design, implement, and support enterprise network infrastructure.

You will configure routers, switches, firewalls, load balancers, and VPNs; monitor performance, security, and capacity; troubleshoot outages; and maintain documentation. A Bachelor’s degree is required; TS/SCI with Polygraph is preferred for sensitive missions. Collaboration with systems, cloud, and security teams is essential.