Senior Cyber Engineer; TS​/SCI w​/CI Poly Security Clearance

Position: Senior Cyber Engineer (TS/SCI w/CI Poly Required) with Security Clearance
Trusted Connectivity for AI-Powered Dominance. Everfox delivers trusted connectivity to protect the world's most critical environments and safeguard the sensitive data powering decision advantage. Built for mission-critical operations, Everfox protects what matters most by securing how data moves, how users access it, and how threats are neutralized across every domain. We enable mission speed and secure collaboration across networks, domains, and allies, while ensuring the data powering AI and advanced analytics remains trusted and protected.

We don't just defend systems; we deliver decision dominance.
* Our Purpose. Protect what matters most by enabling organizations to operate security in the most complex and high-risk digital environments.
* Our Vision. To be the most trusted authority in high-assurance cybersecurity, enabling secure collaboration across every domain.
* Our Belief. Security should never limit mission success - it should enable it. Our Promise. We deliver absolute confidence in environments where failure is not an option.

Job Title:

Senior Cyber Engineer

About the role:

The Senior Cyber Engineer supports critical U.S. Government cybersecurity missions through installation, configuration, and integration of Cross Domain solutions. This role engages directly with customers, addressing complex and fast‑moving technical challenges to ensure successful deployment of secure data‑transfer capabilities. The successful candidate will receive specialized training in Everfox technologies and is expected to become proficient in all aspects of complex software solution deployment.

This role includes CONUS/OCONUS travel to meet customer and project requirements.

Location:

Washington, DC with 50% travel (CONUS and OCONUS).

Key Responsibilities:

* Utilize Linux and scripting expertise to support and field critical customer-driven requirements enabling secure data transfer.

* Engage directly with customers to provide advanced design, analysis, and implementation of Everfox software.

* Work hands‑on in Linux-based environments, troubleshooting on‑site technical issues and configuring Cross Domain solutions to meet customer needs.

* Apply standard networking concepts to support design and implementation of Cross Domain solutions, including failover, load balancing, interoperability, and co‑op configurations.

* Develop data inspection policies using proprietary and open‑source programming languages.

* Provide technical briefings to customers and Everfox leadership.

* Deliver training, troubleshooting, and on-site/remote support for mission-specific requirements.

Work Schedule:

Full-time, Monday-Friday, with flexibility for mission‑critical requirements.
This position requires a minimum of 50% travel to CONUS and OCONUS customer facilities as needed.

Work Location:

Employees are geographically dispersed across the continental U.S. While Everfox has office concentrations in Herndon, VA;
Richardson, TX; and Salt Lake City, UT, applicants may work remotely with management approval. Key Knowledge and

Skills:

* Active TS/SCI clearance with CI Polygraph (required).

* 8+ years of experience supporting enterprise software solutions in a cyber engineer role.

* Advanced experience in Linux and scripting.

* Strong software development experience in procedural programming languages.

* Excellent communication skills with an ability to relay technical concepts to technical and non‑technical audiences.

* Interest or experience in cybersecurity methodologies, technologies, application design, development, or operational environments.

* Strong networking knowledge (TCP/IP, firewalls, routers, etc.).

* Strong understanding of programming logic and methodologies (including regular expressions).

* BS in Computer Science, Computer Engineering, Information Security, or equivalent.

* DoD 8570.1‑M compliance at IAT Level I; SANS GSEC and CISSP preferred. Nice to Have:
* Experience with security design and architecture for Cross Domain Solutions (CDS).

* Working knowledge of virtualized, networked environments (VMWare, Hyper‑V).

* Strong verbal and technical writing skills.

* Experience integrating security COTS products (firewalls, web gateways,…