Network Engineer

American Systems Corporation; United States; On-site; USD 155,000 - 180,000; Full time

Job summary

AMERICAN SYSTEMS is seeking a Lead Network Engineer to support secure network operations in Arlington, VA. The role focuses on enterprise-grade security, Cisco ISE, Firepower, and FMC within a highly classified environment.

Candidates should have 8+ years of experience, DoD 8140/8570 IAT II certification, and a TS/SCI clearance with SAP eligibility. U.S. citizenship is required and opportunities exist within mission teams.

Qualifications

• Active TS/SCI clearance with SAP eligibility and DoD 8140/8570 IAT II certification.
• 8+ years of network engineering experience in enterprise, defense or regulated environments.
• Strong knowledge of Cisco ISE, Cisco Firepower/FMC, and network security practices.
• Experience with AAA, 802.1X, VPN, RMF, and STIG requirements.
• Bachelor’s degree in a related technical field or equivalent experience.

Responsibilities

• Lead secure network engineering and operational support in a highly classified environment.
• Configure, administer, and troubleshoot Cisco ISE for authentication, authorization, accounting, and policy enforcement.
• Administer and optimize Cisco Firepower and FMC, including policy administration and troubleshooting.
• Design, implement, and maintain secure network infrastructure (routers, switches, firewalls, VLANs, ACLs, VPNs).
• Troubleshoot Layer 2/Layer 3, firewall, authentication, and access control issues.
• Support AAA, 802.1X, VPN, RMF, STIG, and secure configuration requirements.
• Develop network diagrams, SOPs, and technical documentation; collaborate with cybersecurity and mission teams.
• Support incident response, outage resolution, root cause analysis, and network remediation.
• Recommend improvements to strengthen network performance, security, and reliability.

Skills

Clearance handling

Communication skills

Independent problem solving

Education

Bachelor’s degree in a related technical field

DoD 8140/8570 IAT II certification

Tools

Cisco ISE

Cisco Firepower

Firepower Management Center (FMC)

Routers & Switches

VPN

Network security

Job description

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.

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

• 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

AMERICAN SYSTEMS is committed to pay transparency for our applicants and employee-owners. The salary range for this position is USD $155,000.00/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.