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 Dallas, TX .

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

• AMS1

Pay Transparency Statement 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. EEO Statement EEO Race/Sex/Disability Status/Veteran Status