--- title: Network Engineer, Lead Firewall Infrastructure description: AMERICAN SYSTEMS is hiring for the Network Engineer, Lead Firewall Infrastructure role in Dallas, TX. See the full description and apply. type: job url: https://www.foundrole.com/jobs/network-security-engineer-lead-sap-at-american-systems-01a12a74-5251-76e7-b494-086e2e289a04 date: 2026-11-15T01:26:44Z og_description: Join AMERICAN SYSTEMS as Network Engineer, Lead Firewall Infrastructure in Dallas, TX. Pays $155K–$180K per year. Full-time role. og_image: https://www.foundrole.com/og/p0z27m.png breadcrumbs: - label: Home url: https://www.foundrole.com/ - label: Search url: https://www.foundrole.com/jobs --- | | | |---|---| | **Company** | AMERICAN SYSTEMS | | **Location** | Dallas, TX | | **Salary** | $155K/yr - $180K/yr | | **Type** | Full Time | | **Posted** | Oct 09, 2026 | ## Is this job real? **Ghost job check:** A- · Low risk. Probably a real opening. ## Visa sponsorship - **H-1B:** No H-1B sponsorship on record for AMERICAN SYSTEMS. - **E-Verify:** No E-Verify enrollment on record for AMERICAN SYSTEMS. ## Pay for similar jobs Most similar jobs pay $94,000 – $169,000 a year (median $129,000). ## Description ## Overview AMERICAN SYSTEMS, a **100% employee-owned** federal government contractor, is seeking a **Lead Network Engineer, Firewall Infrastructure** to support a critical national security mission in a highly classified environment in Dallas, TX. This is a hands-on **network engineering** role focused on **enterprise firewall infrastructure**, **routing and switching**, **secure connectivity**, and **network access control**. The selected candidate will lead the configuration, administration, troubleshooting, and operational support of a complex enterprise network environment. We are seeking an experienced network professional with strong hands-on experience supporting **routers, switches, firewalls, VLANs, VPNs, ACLs, network segmentation, and high-availability network architectures**. Candidates should be comfortable resolving complex **Layer 2 and Layer 3 network issues**, administering firewall platforms, and maintaining reliable, resilient network services. ## Responsibilities As a **Lead Network Engineer, Firewall Infrastructure** with AMERICAN SYSTEMS**,** you will: - Lead **network engineering**, administration, and operational support activities in a highly classified environment. - Design, implement, configure, and maintain **enterprise network infrastructure**, including: * **Routers, switches, and firewalls** * **VLANs, ACLs, VPNs, and network segmentation** * **High-availability, resilient network architectures** - Administer, monitor, troubleshoot, and maintain **enterprise firewall environments**. - Configure and manage **firewall policies**, access rules, NAT, VPNs, security zones, logging, and monitoring. - Support and troubleshoot **Cisco Firepower** and **Firepower Management Center (FMC)**. Cisco Firepower experience is preferred. - Troubleshoot complex **Layer 2 and Layer 3** issues involving **routing, switching, firewall connectivity, access controls, and enterprise network services**. - Support **AAA**, authentication, authorization, accounting, and **network access control** requirements. - Configure and troubleshoot **802.1X**, VPN, and NAC solutions. - Support **Cisco ISE** environments, including authentication, authorization, policy enforcement, and network access control. - Support network-related **RMF**, **STIG**, secure configuration, vulnerability remediation, and compliance activities. - Develop and maintain **network diagrams**, implementation plans, standard operating procedures, configuration documentation, and technical reports. - Partner with cybersecurity, systems administration, and mission teams to deliver reliable and resilient **network services**. - Support network outages, root cause analysis, change implementation, remediation efforts, and incident-response activities related to network infrastructure. - Monitor **network performance** and recommend improvements to availability, reliability, performance, and infrastructure resiliency. - Provide technical leadership, mentoring, and guidance to network engineering and operations personnel. ## Qualifications - U.S. citizenship required. - **Active Top Secret clearance required**, with eligibility to obtain **SCI and SAP access**. - Bachelor’s degree in a related technical field, or *additional relevant experience in lieu of a degree*. - 8+ years of experience in **network engineering**, **network operations**, **network infrastructure**, or firewall administration. - Active DoD 8140/8570 **IAT Level II** certification, e.g., **Security+ CE**, CySA+, SSCP, or an equivalent certification. - Active **Cisco Certified Network Associate (CCNA) certification** or higher-level Cisco networking certification. - Strong hands-on experience with **enterprise network infrastructure**, including: * **Routing and switching** * **Layer 2 and Layer 3 troubleshooting** * **VLANs, subnetting, IP addressing, and network design** * **Access control lists (ACLs) and VPN technologies** * **Network segmentation and resilient network architectures** - Hands-on experience administering and troubleshooting **enterprise firewall platforms**. - Experience with one or more of the following **firewall technologies**: * **Cisco Firepower and Firepower Management Center (FMC)** *preferred* * Palo Alto Networks * Fortinet * Check Point * Other commercial or government enterprise firewall platforms - Experience with **firewall policy administration**, rule management, NAT, VPNs, security zones, logging, monitoring, and troubleshooting. - Experience supporting **AAA**, **802.1X**, **network access control**, RMF, STIG, and secure configuration requirements. - Cisco ISE experience preferred, particularly with: * Authentication * Authorization * Accounting * Policy enforcement * Network access control - Experience troubleshooting **Cisco routers, switches, firewalls, and enterprise network infrastructure**. - Ability to work independently, lead technical efforts, and resolve complex **network and firewall infrastructure** issues. - Strong written and verbal communication skills. ### Additional Experience We Value The following experience is helpful but not required: - Experience supporting highly compartmented or special-access classified environments. - Advanced Cisco networking certifications, such as **CCNP Enterprise**, **CCNP Security**, or **CCIE**. - Experience with Palo Alto Networks, Fortinet, Check Point, or other **enterprise firewall technologies**. - Experience with **Cisco ISE**, **NAC**, **802.1X**, or related access control platforms. - Experience supporting **network modernization**, infrastructure upgrades, technology refreshes, network migrations, or data center transformation efforts. - Experience developing **network diagrams**, implementation plans, configuration documentation, and standard operating procedures. - Experience with network change management, outage resolution, root cause analysis, and incident response in classified environments. - Familiarity with VMware or other virtualized environments. #LI-PRK1 ## 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 ## Skills - High Availability Systems - IEEE 802.1X - Open Web Application Security Project (Owasp) - Cyber Security - Technical Leadership - System Administration - Cisco Certified Network Associate - Cisco Certified Network Professional - IBM Certified SOC Analyst - QRadar SIEM V7.4.3 Plus CompTIA Cybersecurity Analyst - Palo Alto Networks - Access Controls - Routing and Switching - DoD IAT Level II Certification - Network Engineering - Cisco Certified Internetwork Expert - Logging - Authentication (Software Security) - Cisco - DoD 8140 (Cyberspace Workforce) - Layer 3 Networking - Electrical Equipment Components - Root Cause Analysis - Virtual Local Area Network (Vlan) - Firewall - Technical Writing - Data Centers - Network Infrastructure - Systems Security Certified Practitioner - Fortinet - Subnetting - Virtual Private Networks (Vpn) - Network Routing - Xilinx Integrated Software Environment ISE - Network Access Control - Mentoring - VMware - Incident Response - Policy Enforcement - Cisco Networking - Classified Environments - Layer 2 Networking - Network Administration - Standard Operating Procedures (Sop) - Access Control Lists - Security Technical Implementation Guides (Stig) - Top Secret Security Clearance - Network Switching - Ability to Work Independently - Check Point - Network Diagrams - Network Monitoring - Vulnerability Management - Communication - SAP - IP Addressing - Change Management - Network Address Translation (Nat) - Policy Administration - Network Segmentation - Firewall Configuration - Network Operations - CompTIA Security+ ## Benefits - Health Insurance - Other Retirement and Savings ## Related - [Technology & Software jobs](https://www.foundrole.com/careers/technology-and-software?utm_source=ai_markdown)- [Network & Systems Administration jobs](https://www.foundrole.com/careers/technology-and-software/network-and-systems-administration?utm_source=ai_markdown)- [Network Engineer / Architect jobs](https://www.foundrole.com/careers/technology-and-software/network-and-systems-administration/network-engineer-architect?utm_source=ai_markdown)- [Browse all companies](https://www.foundrole.com/companies?utm_source=ai_markdown) ## Explore this job market - [Texas](https://www.foundrole.com/locations/us/texas?utm_source=ai_markdown) — 234452 jobs - [IT Services and Consulting](https://www.foundrole.com/sectors/technology/it-services-and-consulting?utm_source=ai_markdown) — 150239 jobs - [Dallas, TX](https://www.foundrole.com/locations/us/texas/dallas?utm_source=ai_markdown) — 24741 jobs ## Related pages - [Texas](https://www.foundrole.com/locations/us/texas?utm_source=ai_markdown) — 234452 jobs - [IT Services and Consulting](https://www.foundrole.com/sectors/technology/it-services-and-consulting?utm_source=ai_markdown) — 150239 jobs - [Dallas, TX](https://www.foundrole.com/locations/us/texas/dallas?utm_source=ai_markdown) — 24741 jobs ## Browse - [Companies](https://www.foundrole.com/companies?utm_source=ai_markdown) - [Jobs by country](https://www.foundrole.com/locations?utm_source=ai_markdown) - [Jobs in the United States by state and city](https://www.foundrole.com/locations/us?utm_source=ai_markdown) - [H1B sponsors by location](https://www.foundrole.com/h1b-sponsors?utm_source=ai_markdown) - [H1B salaries](https://www.foundrole.com/h1b-salaries?utm_source=ai_markdown) - [Sectors and industries](https://www.foundrole.com/sectors?utm_source=ai_markdown) - [Jobs by career field](https://www.foundrole.com/careers?utm_source=ai_markdown) - [Latest jobs](https://www.foundrole.com/jobs/latest?utm_source=ai_markdown)