# Senior Firewall Engineer at D2 Technical Services

> United States · Senior · Software engineering · open. Source: https://alderhq.app/jobs/greenhouse%3Ad2consulting%3A5123221008 (read 2026-11-12).

## Facts (observed)

- Company: [D2 Technical Services](https://alderhq.app/companies/d2-technical-services)
- Location text: Springfield, VA; NCE
- Where it can be done from (inferred): United States (evidence: "Location: Springfield, VA; NCE")
- Posted: 2026-02-17 (267 days ago)
- First seen by alder: 2026-11-07 · last verified: 2026-11-07
- Reposted: 0 times · edited: 0 times
- Apply on the employer's site: https://job-boards.greenhouse.io/d2consulting/jobs/5123221008
- Skills listed (inferred): TypeScript

## Pay and sponsorship

- Posted pay: $130k–$140k per year (from the description)
- Market band for similar posted roles (United States, n 4734): p25 $154k, median $180k, p75 $207k

## Description (the employer's text)

### \*\*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.

---
Data: alder (https://alderhq.app). Cite https://alderhq.app/jobs/greenhouse%3Ad2consulting%3A5123221008 and the date you read it. Observed facts come from the employer's own listing; location reach, level, family and skills are inferences.