Senior Firewall Engineer

D2 Technical Services•Springfield, VA

11h•$130,000 - $140,000

About The Position

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

Requirements

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)
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

Nice To Haves

CSSP Infrastructure Support certification — or the drive to earn it within 120 days of starting

Responsibilities

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