Network Administrator, Lead; HPC Security Clearance

Position: Network Administrator, Lead (HPC) with Security Clearance
AMERICAN SYSTEMS, a 100% employee-owned federal government contractor, is seeking a Network Administrator to support asecure, high-availability Linux-based HPC environment with geographically dispersed operations. This role is ideal for a hands-on network professional experienced in high-bandwidth, low-latency inter-site communications. You will support advanced compute platforms, high-capacity data transfers, optical transport, enterprise services, and secure connectivity across Cisco, Juniper, and Ciena infrastructure.

This role includes a $5,000 sign-on bonus in addition to a generous compensation package. Responsibilities As a Lead Network Administrator working for AMERICAN SYSTEMS in a high-performance computing environment, you will:
* 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-b ased 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. Qualifications
* 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, trace route, 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 AMS1 #LI-PK2 Pay Transparency Statement AMERICAN SYSTEMS is committed to pay transparency for our applicants and employee-owners. The salary range for this position is USD $/Yr.

- USD $195,000/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