Lead Network Engineer – HPC

AMERICAN SYSTEMS

Lead Network Engineer supporting high-availability Linux-based HPC environments with a focus on low-latency, high-bandwidth communications and advanced compute platforms.

Posted 6/18/2026full-timeArlington • Virginia • 🇺🇸 United StatesSenior💰 $165,000 - $195,000 per yearWebsite

Tech Stack

Tools & technologies

Cyber SecurityDNSFirewallsLinuxSwitchingTCP/IPTypeScript

About the role

Key responsibilities & impact

Architect and engineer high-bandwidth, low-latency inter-site network solutions connecting geographically dispersed HPC sites .
Design scalable communications architectures supporting high-capacity data transfers , redundancy, traffic optimization, secure connectivity, and mission-critical availability.
Configure, maintain, and troubleshoot Cisco , Juniper , and Ciena routing, switching, firewall, VPN, optical transport, and data circuit infrastructure.
Administer Linux-based networks supporting compute, storage, management, and user access, including host interfaces, bonding, VLAN tagging, routing, DNS, DHCP, and name resolution.
Support Cisco ISE administration, firewall policies, network segmentation, ACLs, VLANs, VPNs, authentication, authorization, policy enforcement, and device access control.
Use CLI-based tools to diagnose routing, switching, MTU, latency, throughput, and connectivity issues across network devices and Linux hosts.
Support inter-site provisioning and lifecycle activities , including maintenance, upgrades, technology refresh, documentation, diagrams, standards, and operational procedures.
Partner with systems, cybersecurity, and infrastructure teams to maintain secure, reliable mission operations.

Requirements

What you’ll need

TS/SCI clearance with SAP eligibility
DoD 8140 IAT II certification or higher, Security+ CE or equivalent
Bachelor’s degree in IT, Computer Science, Engineering, or related field, (directly related experience in lieu of degree)
8–12 years of network administration, engineering, or architecture experience in enterprise or HPC environments
CCNA or equivalent Cisco experience required; advanced Cisco certifications strongly valued.
Experience designing, supporting, and troubleshooting high-bandwidth, low-latency multi-site networks , including Cisco routing/switching, Cisco ISE, firewalls, VPNs, optical transport, and high-capacity data circuits ( Juniper and Ciena experience strongly valued)
Strong knowledge of Layer 2/Layer 3 , TCP/IP, VLANs, routing, ACLs, DNS, DHCP, high availability, segmentation, MTU, latency, throughput, and traffic optimization
Linux networking experience, including interfaces, bonding, VLAN tagging, routing, name resolution, port connectivity, CLI troubleshooting, and performance analysis
Experience with tools such as ip, ss, tcpdump, ping, traceroute, dig , and nslookup
Team-oriented and collaborative, with the ability to work independently with general direction
Open to learning new tools, technologies, and processes
Professional, adaptable, and well-suited for a mission-focused environment

Benefits

Comp & perks

comprehensive benefits package
healthcare benefits
paid leave
retirement plans
insurance programs
education and training assistance
$5,000 sign-on bonus

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

network administrationnetwork engineeringnetwork architecturehigh-bandwidth networkslow-latency networksCisco routingCisco switchingLinux networkingtraffic optimizationhigh-capacity data circuits

Soft Skills

team-orientedcollaborativeindependent workadaptabilityprofessionalismmission-focused

Certifications

TS/SCI clearanceDoD 8140 IAT IISecurity+ CECCNA