Senior Firewall Engineer with Security Clearance

D2 Consulting; Springfield (VA); On-site; USD 130,000 - 140,000; Full time

Benefits offered by this job

Health/Dental/Vision

401(k) match

Accrued PTO

Life Insurance

Job summary

D2 Consulting is seeking a Senior Firewall Engineer in Springfield, VA to join a high-impact team protecting mission-critical infrastructure. The role requires an active TS/SCI clearance and DoD 8140/IAT II certification, with responsibilities spanning design, deployment, incident response, and policy development.

You will own the security stack (firewalls, F5, gateways, IDS) and collaborate with government leaders to ensure robust cyber defense across WAN/LAN/remote environments.

Qualifications

• Active TS/SCI clearance required (current)
• DoD 8140.01 / 8570.01-M IAT Level II compliant certification current
• CSSP Infrastructure Support certification - or plan to earn within 120 days of starting

Responsibilities

• Design & build secure network architectures from concept to implementation
• Protect the network by managing WAN, LAN, CAN, and remote security environments
• Own the security stack including firewalls, F5 load balancers, gateways, IDS platforms
• Lead incident response—investigate, document, and drive corrective action
• Develop SOPs to shape security operations for the broader team
• Research and evaluate emerging network security technologies
• Serve as liaison to contract leadership, customers, and government DAA stakeholders on security posture and policies

Skills

Security architecture design

Incident response leadership

Policy & compliance

Education

BA/BS degree preferred

Tools

Palo Alto

Juniper

Cisco

FireEye

F5 Load Balancer

Cisco FTD

Unix/Linux

Windows Server

VMware

Job description

Senior Firewall Engineer - Springfield, VA

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

• 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

• 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.

Skills

• 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.