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Network Engineer, Lead - Cisco ISE​/Firepower

Job in Arlington, Arlington County, Virginia, 22201, USA
Listing for: AMERICAN SYSTEMS
Full Time position
Listed on 2026-06-09
Job specializations:
  • IT/Tech
    Cybersecurity, Systems Engineer, Network Security
Salary/Wage Range or Industry Benchmark: 180000 USD Yearly USD 180000.00 YEAR
Job Description & How to Apply Below
Position: Network Engineer, Lead - Cisco ISE / Firepower
Overview

AMERICAN SYSTEMS, a 100% employee-owned company, is seeking a Lead Network Engineer to support secure network operations in a highly classified environment in Arlington, VA.

We're looking for someone with strong hands-on experience in Cisco ISE, Cisco Firepower, and enterprise network security to make a direct impact on a critical national security mission.

Responsibilities

As a Lead Network Engineer at AMERICAN SYSTEMS, you will:

* Lead secure network engineering and operational support in a highly classified environment

* Configure, administer, and troubleshoot Cisco ISE for authentication, authorization, accounting, network access control, and policy enforcement

* Administer and optimize Cisco Firepower and Firepower Management Center (FMC), including policy administration, rule management, and troubleshooting

* Design, implement, and maintain secure network infrastructure, including routers, switches, firewalls, VLANs, ACLs, VPNs, and segmented architectures

* Troubleshoot complex Layer 2/Layer 3, firewall, authentication, and access control issues

* Support AAA, 802.1X, VPN, RMF, STIG, and secure configuration requirements

* Develop and maintain network diagrams, implementation plans, SOPs, and technical documentation

* Partner with cybersecurity, systems administration, and mission teams to deliver secure, resilient infrastructure solutions

* Support incident response, outage resolution, root cause analysis, and network remediation efforts

* Recommend improvements to strengthen network performance, security, and reliability

Qualifications

* U.S. citizenship required

* Active TS/SCI clearance required with SAP eligibility

* Bachelor's degree in a related technical field, or additional relevant experience in lieu of a degree

* 8+ years of network engineering experience in enterprise, defense, intelligence, or other highly regulated environments

* Strong experience with Cisco ISE and Cisco Firepower/FMC

* Experience supporting AAA, 802.1X, VPN, RMF, and STIG requirements

* Active DoD 8140/8570 IAT II certification required, e.g., Security+ CE, CySA+, SSCP, or equivalent

* Strong knowledge of Layer 2/Layer 3 networking, routing, switching, VLANs, ACLs, subnetting, and segmentation

* Experience troubleshooting Cisco routers, switches, firewalls, and enterprise networks

* Ability to work independently and solve complex technical problems

* Strong written and verbal communication skills

Additional Experience We Value The following experience may be helpful in this role, but is not required for consideration:

* Experience supporting highly compartmented classified environments

* Cisco certifications such as CCNA, CCNP Enterprise, CCNP Security, or CCIE

* Experience with network modernization, infrastructure upgrades, or technology refresh efforts

* Experience with incident response, change management, and root cause analysis in classified environments

* Experience supporting virtualized environments such as VMware

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 $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
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