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# Senior Firewall Engineer

- **Company:** D2 Technical Services
- **Location:** Springfield, VA, United States
- **Experience:** Expert
- **Salary:** $130,000 - $140,000
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Unix, Cyber Security, Intrusion Detection Systems, Network Security, Network Architecture, Network Administration, Red Hat Enterprise Linux, Network Routers, Load Balancing, Firewalls (Computer Science), Juniper, Build Management, Palo Alto Networks, Fireeye, Cisco, Vmware
- **Published:** November 9, 2026
- **Apply:** https://www.careerbuilder.com/job-details/senior-firewall-engineer-springfield-va--6a059684-8a39-404a-8103-18e14b751572

## About the Role

Firewalls, Consulting, Leadership, Firewalls, Government, Enterprise Protection, Network Architecture/Engineering, Network Administration/Management, Incident Response, Intrusion Detection Systems, * Active TS/SCI clearance (must be current)

 * Ability to pass a U.S. Government Polygraph (post-hire)
 * DoD 8140.01 / 8570.01-M IAT Level II compliant certification (current)
 * CSSP Infrastructure Support certification - or the drive to earn it within 120 days of starting, * 5+ years in Network Security within large-scale enterprise or global environments
 * BA/BS degree preferred - but strong hands-on experience can speak just as loudly. You can substitute a degree with 4 years of additional experience
 * Firewalls: Palo Alto, Juniper, Cisco
 * Routers/Switches: Juniper, Cisco
 * IDS/Threat Tools: FireEye, F5 Load Balancer, Cisco FTD
 * OS/Platforms: Unix, RHEL, Windows Enterprise AD, VMware

Why This Role?

You'll be part of a team that works on problems that actually matter - supporting government missions at the highest levels. If you're a network security professional who wants scope, challenge, and the chance to influence enterprise-wide security decisions, this is the place.

## Description

This isn't a "maintain the status quo" role. You'll be solving real security challenges at enterprise scale:

 * Design & build state-of-the-art secure network architectures - from concept to implementation
 * Protect the network by managing WAN, LAN, CAN, and remote security environments, handling incidents with speed and precision
 * Own the security stack - firewalls, F5 load balancers, web/mail gateways, IDS platforms, and management tools
 * Lead incident response - investigate, document, and drive corrective action when it matters most
 * Shape security operations by developing SOPs that the broader team will rely on
 * Stay ahead of threats by researching and evaluating emerging network security technologies
 * Be the expert in the room - serve as a trusted liaison to contract leadership, customers, and government DAA stakeholders on security posture, policies, and procedures