# Senior Firewall Engineer - Company: [D2consulting]() - Location: Springfield, VA - Team: D2 - Posted: February 17, 2026 ## Job description **\*\*ACTIVE TS/SCI SECURITY CLEARANCE REQUIRED\*\*** **D2 Consulting** is looking for a skilled Senior Firewall Engineer to join a high-impact team protecting mission-critical infrastructure. You'll work side-by-side with both corporate and government leadership — meaning your work gets noticed, and your voice matters. --- ## What You'll Actually Be Doing 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 --- ## What You Bring to the Team **Required Clearance & Certifications:** * 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 **Experience:** * 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. **Additional Information** * All your information will be kept confidential according to EEO guidelines. * Compensation is unique to each candidate and relative to the skills and experience they bring to the position. The salary range for this position is typically $130-140k. This does not guarantee a specific salary as compensation is based upon multiple factors such as education, experience, certifications, and other requirements, and may fall outside of the above-stated range. * Highlights of our benefits include Health/Dental/Vision, 401(k) match, Accrued PTO, STD/LTD/Life Insurance, Referral Bonuses, professional development reimbursement, and more! *D2 Consulting is committed to a merit-based recruitment process and encourages applications from all qualified individuals.  As a Veteran-Owned Small Business, we particularly welcome applications from veterans who have the requisite skills and experience.  Job applicants that are interested in one of our openings and may require a reasonable accommodation to participate in the job application or interview process, should contact us to request an accommodation.* ## Apply [Apply on D2consulting]() Canonical job page: