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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Network Engineer, Senior (HPC) - **Company:** AMERICAN SYSTEMS - **Location:** Arlington, VA, United States - **Experience:** Expert - **Salary:** $150,000.0 - **Contract:** Permanent contract - **Skills:** IEEE 802.1Q, User Authentication, Command-Line Interface, Cyber Security, Computer Networks, Dynamic Host Configuration Protocol, Linux, Domain Name System (DNS), Networking Hardware, Traceroute, Virtual Private Networks (VPN), Network Layer, Name Server, Network Diagrams, Routing, Network Segmentation, Network Administration, Nslookup, Ping (Networking Utility), Red Hat Enterprise Linux, SAP (Applications), TCP/IP, Tcpdump, Virtual Local Area Networks, Identity Services Engine, System Availability, Firewalls (Computer Science), Juniper, Information Technology, Low Latency, Cisco - **Published:** July 7, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9014002/network-engineer-senior-hpc ## About the Role * TS/SCI clearance with SAP eligibility * DoD 8140 IAT II certification or higher, such as Security+ CE * Bachelor's degree in IT, Computer Science, Engineering, or related field, or equivalent directly related experience in lieu of degree * 5-7 years of experience in network engineering, network administration, or related infrastructure roles * CCNA or higher certification * Strong experience with Linux CLI, including troubleshooting on RHEL-based systems * Experience with Linux networking concepts such as interfaces, bonding, VLAN tagging, routing, name resolution, port connectivity, and performance analysis * Experience using tools such as ip, ss, tcpdump, ping, traceroute, dig, and nslookup * Experience supporting high-bandwidth, low-latency, multi-site networks * Strong knowledge of Layer 2/Layer 3, TCP/IP, VLANs, routing, ACLs, DNS, DHCP, high availability, segmentation, MTU, latency, and throughput * Experience with Cisco routing and switching, firewalls, VPNs, and high-capacity data circuits * Ability to work independently with general direction in a mission-focused team environment Ideal Qualifications * Experience with Juniper and Ciena * Experience supporting HPC, research computing, or other performance-sensitive environments * Experience with Cisco ISE * Familiarity with optical transport and inter-site connectivity * Strong documentation and cross-team collaboration skills * Professional, adaptable, and open to learning new tools and technologies Pay Transparency Statement ## Description As a Senior Network Engineer working in a secure high-performance computing environment, you will: * Support the design, implementation, and optimization of high-bandwidth, low-latency inter-site networks * Troubleshoot connectivity and performance issues using Linux CLI tools and network device command line interfaces * Administer RHEL-based networked environments, including interfaces, bonding, VLAN tagging, routing, DNS, DHCP, and name resolution * Configure and support Cisco, Juniper, and Ciena infrastructure, including routing, switching, firewalls, VPNs, optical transport, and data circuits * Support network segmentation, ACLs, VLANs, VPNs, and device access control in secure environments * Assist with Cisco ISE administration, authentication, authorization, and policy enforcement * Analyze and resolve issues involving routing, MTU, latency, throughput, and traffic flow * Support maintenance, upgrades, technology refresh, documentation, network diagrams, and operational procedures * Partner with systems, cybersecurity, and infrastructure teams to sustain secure, reliable mission operations ## Related Videos - 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