Senior Principal Cyber Engineer

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 Principal Cyber Engineer

The Position:

We are looking for talented cyber engineers motivated to help customers solve complex and fast-moving cybersecurity challenges supporting the U.S. Government. Focusing on our Cross Domain solutions, you will interface directly with customers and play a key role in installing, configuring, and integrating a Cross Domain solutions to ensure customer success. The successful and highly motivated candidate will be offered specialized training to support our technologies and is expected to become proficient in all aspects of complex software solution deployment. This position provides the opportunity for CONUS/OCONUS travel to meet customer and project requirements.

Everfox Products: To learn more about Everfox products visit

What You'll be Doing:

• Self-starter utilizing your Linux and scripting expertise to support and field critical customer driven requirements, enabling secure data transfer
• Utilize interpersonal skills to engage directly with the customer to provide advanced design, analysis and implementation of our software
• Demonstrate competency working hands-on in Linux based environments, troubleshooting on-site technical issues, using and configuring the Everfox solutions to deliver critical customer driver requirements
• Leverage standard networking concepts to support the design and implementation of Cross Domain solution to include failover, co-op, and load balancing as well as interoperability with other components within the enterprise
• Develop data inspection policies using proprietary and open source programming languages
• Provide technical briefings to customers and Everfox corporate leadership as required
• Mission oriented to provide training, troubleshooting, and on-site/remote support to customers.

Work Schedule: Full Time, Monday – Friday (standard work schedule with flexibility for mission critical requirements)

This position requires minimum travel (25% or less) to CONUS and OCONUS customer facilities as needed to meet customer and project requirements.

Things You Must Have to Apply:

• Must be a US Citizen
• Ability to obtain a Secret clearance
• 15+ years of experience in a cyber engineer role supporting enterprise software solutions
• Advanced experience in Linux and scripting
• Advanced software development experience using procedural programming languages
• Excellent communication skills and ability to relay technical information to customers and laypersons
• Interest or experience in cyber security to include practices/methodologies, associated technologies, application design and development and/or experience in an operational environment
• Strong knowledge of networking concepts (e.g. TCP/IP, firewalls, routers, etc.)
• Strong knowledge of programming logic and methodologies (e.g., regular expressions)
• BS Computer Science, Computer Engineer, Information Security or equivalent
• DODI 8570.1-M Compliance at IAT Level I; SANS GSEC, CISSP preferred

Things that would be Nice to Have:

• Advanced experience with security design and architecture of Cross Domain solutions (CDS)
• Working knowledge of virtualized, networked environments, specifically VMWare and HyperV based systems
• Strong verbal and technical writing skills
• Experience with security COTS product integration (e.g., firewall, web gateways, Data Loss Prevention)
• Prepare documentation to support Assessment and Authorization (A&A) activities
• Apply knowledge of current Information Assurance (IA) policies as a contributor to the architecture and design of secure solutions to customer needs and requirements
• A reasonable estimate of the base salary range for this role is: $210,400.00-234,700.00 USD

The actual salary offered may vary within the range based on a candidates' unique experience, locale, and business needs. In addition to a base salary and bonus plans, Everfox offers a generous benefits package including flexible PTO, a 401k match, and contribution to healthcare coverages. Our Talent Acquisition team will provide specific information regarding bonus eligibility and benefits offerings.

Don’t meet every single qualification? Studies show people are hesitant to apply if they don’t meet all requirements listed in a job posting. If there is something slightly different about your previous experience, but it otherwise aligns and you’re excited about this role, we encourage you to apply. You could be a great candidate for this or other roles on our team.

Everfox is an equal employment opportunity employer and complies with all applicable federal, state, and local laws prohibiting discrimination. Everfox does not discriminate against any employee or applicant based on race, color, religion, sex, age, national origin, disability, veteran status, marital status, medical condition, or any other category protected by applicable law. If you are a qualified individual with a disability or a disabled veteran, you may request a reasonable accommodation if you are unable or limited in your ability to use or access the Company’s career webpage as a result of your disability. You may request reasonable accommodations by sending an email to View email address on click.appcast.io . Everfox is a Federal Contractor. Certain positions with Everfox require access to controlled goods and technologies subject to the International Traffic in Arms Regulations or the Export Administration Regulations. Applicants for these positions may need to be "U.S. Persons," as defined in these regulations. Generally, a "U.S. Person" is a U.S. citizen, lawful permanent resident, or an individual who has been admitted as a refugee or granted asylum. Applicants must have the right to work in the location to which you have applied.