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

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.

We’re hiring for a hybrid role. You’ll work on-site with your team several days each week (typically 2–3), with the specific days set by your manager. Because regular in-person collaboration is central to this job, we look for candidates who live within about 50 miles of the office. Everfox will consider reasonable accommodation as required by law.

The Senior Cyber Engineer will play a critical role in designing, deploying, and supporting enterprise Cross Domain solutions for U.S. Government customers. This position is focused on Everfox Cross Domain technologies and requires direct customer engagement to ensure successful implementation and ongoing support. Specialized training will be provided, and the candidate is expected to become proficient in all aspects of complex software solution deployment.

Herndon, VA with 50% travel (CONUS and OCONUS).

• 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 solutions.
• Review, analyze, and define requirements; design integrated solutions; implement Everfox and non-Everfox technologies; integrate multiple tools across disciplines; perform formal security and functional testing.
• Troubleshoot technical issues onsite in Linux-based environments, configure Everfox solutions, and deliver customer requirements.
• Work on complex network environments, troubleshoot issues, design and implement failover capabilities, and validate interoperability with enterprise components.
• Provide technical briefings to customers and Everfox corporate leadership as required.
• Deliver training, troubleshooting, and on-site/remote support to customers as mission needs require.

• Active TS/SCI clearance with CI Polygraph (currently in use).
• Minimum of 8 years’ experience in a cyber engineer role supporting enterprise software solutions.
• Strong experience in Linux and scripting.
• Excellent communication skills; ability to relay technical information to customers and laypersons.
• Interest or experience in cybersecurity practices, methodologies, technologies, application design and development, or operational environments.
• Excellent knowledge of networking concepts (e.g., TCP/IP, firewalls, routers).
• BS in Computer Science, Computer Engineering, Information Security, or equivalent.
• DODI 8570.1-M Compliance at IAT Level I; SANS GSEC, CISSP preferred.

• Typically requires a minimum of 8 years of related experience.
• Professional certifications preferred (SANS GSEC, CISSP).
• May…