Network Engineer, Senior (HPC)

Overview AMERICAN SYSTEMS, a 100% employee-owned federal government contractor, is seeking a Senior Network Engineer with strong Linux CLI experience to support a secure RHEL-based HPC environment in Arlington, VA . This role is ideal for a hands-on engineer who can support high-bandwidth, low-latency networks , troubleshoot across network devices and Linux hosts , and help maintain secure, mission-critical inter-site connectivity in a performance-sensitive environment. This role includes a $5,000 sign-on bonus in addition to a generous compensation package. Responsibilities 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 Qualifications 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 AMERICAN SYSTEMS is committed to pay transparency for our applicants and employee-owners. The salary range for this position is USD $150,000.00/Yr. - USD $180,000/Yr. Actual compensation will be determined based on several factors permitted by law. AMERICAN SYSTEMS provides for the welfare of its employees and their dependents through a comprehensive benefits program by offering healthcare benefits, paid leave, retirement plans, insurance programs, and education and training assistance. EEO Statement EEO Race/Sex/Disability Status/Veteran Status #J-18808-Ljbffr AMERICAN SYSTEMS