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Senior Firewall Engineer

Job in Springfield, Fairfax County, Virginia, 22161, USA
Listing for: D2 Technical Services
Full Time position
Listed on 2026-08-30
Job specializations:
  • IT/Tech
    Cybersecurity, Network Security
Salary/Wage Range or Industry Benchmark: 130000 - 140000 USD Yearly USD 130000.00 140000.00 YEAR
Job Description & How to Apply Below


** 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
  • Routers/Switches: Juniper, Cisco
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.

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Position Requirements
10+ Years work experience
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