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Network Engineer - Firewall & Load Balancing Security Clearance
Job in
Springfield, Fairfax County, Virginia, 22150, USA
Listed on 2026-07-21
Listing for:
Peraton
Full Time
position Listed on 2026-07-21
Job specializations:
-
IT/Tech
Cybersecurity, Network Security
Job Description & How to Apply Below
About Peraton Peraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world's leading mission capability integrator and transformative enterprise IT provider, we deliver trusted, highly differentiated solutions and technologies to protect our nation and allies. Peraton operates at the critical nexus between traditional and nontraditional threats across all domains: land, sea, space, air, and cyberspace.
The company serves as a valued partner to essential government agencies and supports every branch of the U.S. armed forces. Each day, our employees solve the most daunting challenges that our customers face. Visit to learn how we're keeping people around the world safe and secure. About
The Role Peraton is seeking an experienced Network Engineer to join our team of qualified and diverse individuals. The Network Engineer - Firewall & Load Balancing will support the DHS CBP Network Operations Center (NOC) by designing, implementing, securing, and maintaining enterprise network security infrastructure. This role will provide hands-on support for mission critical network environments with a focus on F5 BIG-IP load balancing solutions, Palo Alto Next Generation Firewalls (NGFW), and Cisco Firepower Threat Defense (FTD) managed through Firepower Management Center (FMC).
The ideal candidate will have experience managing complex enterprise security platforms, troubleshooting network security issues, implementing secure configurations, and supporting hybrid infrastructure environments. The Network Security Engineer will collaborate with network operations, cybersecurity teams, and government stakeholders to maintain secure, reliable, and compliant network services.
Location:
Onsite based in either Ashburn, VA, Springfield, VA or Orlando, FL. Candidates must reside near one of these locations to be considered.
Day to Day
Roles and Responsibilities:
* Design, configure, maintain, and troubleshoot enterprise network security infrastructure, including firewalls, load balancers, VPN solutions, and network security platforms.
* Administer and support F5 BIG-IP environments, including Local Traffic Manager (LTM), Global Traffic Manager (GTM/DNS), virtual servers, pools, iRules, SSL profiles, health monitors, and traffic policies.
* Perform SSL/TLS certificate management, traffic optimization, application delivery troubleshooting, and load balancing configuration.
* Support F5 Advanced Web Application Firewall (WAF) policies and security configurations.
* Configure and manage Palo Alto Networks Next Generation Firewalls, including security policies, NAT, QoS, decryption, and VPN configurations.
* Administer Palo Alto Panorama for centralized firewall management across enterprise environments.
* Configure and maintain Palo Alto security capabilities, including App-, User-, Content-, Threat Prevention, URL Filtering, and Wild Fire.
* Manage Cisco Firepower Threat Defense (FTD) devices using Firepower Management Center (FMC).
* Develop and maintain Access Control Policies (ACP), IPS policies, malware inspection policies, and Snort rule tuning within Cisco FMC.
* Perform firewall event analysis, security monitoring, incident investigation, and troubleshooting activities.
* Support network engineering activities including VLANs, segmentation, routing protocols, VPN connectivity, and network performance optimization.
* Develop and maintain network documentation including diagrams, standard operating procedures, and technical runbooks.
* Support change management activities by ensuring network security changes are tested, documented, approved, and implemented in accordance with established processes.
* Monitor network performance, troubleshoot incidents, perform root cause analysis, and support service level agreement (SLA) requirements.
* Collaborate with cybersecurity teams to support Zero Trust architecture, defense in depth strategies, and security compliance requirements.
Qualifications
Basic Qualifications:
* Bachelor's degree with 8 years of experience, Master's degree and 6 years of experience, Associate's degree with 10 years of experience, or High School Diploma/equivalent with 12 years of experience.
* U.S. Citizenship (Required for CBP and government positions)
* Must have the ability to obtain a CBP Public Trust clearance.
* 5+ years of hands-on experience supporting enterprise network engineering or network security environments.
* Experience administering and troubleshooting F5 BIG-IP solutions, including LTM, virtual servers, pools, SSL profiles, and traffic management configurations.
* Experience configuring and managing Palo Alto Networks Next Generation Firewalls, including security policies, NAT, VPNs, and Panorama administration.
* Experience supporting Cisco Firepower Threat Defense (FTD) devices using Firepower Management Center (FMC).
* Strong understanding of network security concepts, TCP/IP networking, OSI model,…
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