Senior Firewall Engineer — TS/SCI Clearance, Mission-Critical

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

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.