Full-Time
Software Engineer III
TS/SCI w/CI Poly Required
Posted on 8/13/2025
Everfox
501-1,000 employees
High-assurance cybersecurity platform for government
Compensation Overview
$118.4k - $150.8k/yr
Reston, VA, USA
In Person
Some minimum travel may be required.
US Top Secret Clearance, US Citizenship, UK Top Secret Clearance, UK Citizenship, Canada Top Secret Clearance, Canada Citizenship Required
 Software Engineering (3) |
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- Active (currently in use) TS/SCI clearance with Counter Intelligence Polygraph
- This position will require access to information that is subject to the U.S International Traffic in Arms Regulations (ITAR) and Export Administration Regulations (EAR). The applicant must have the ability to obtain the appropriate work authorizations that may be required under U.S. ITAR or EAR regulations from the applicable U.S government agency.
- BS Computer Science, Computer Engineer, Information Security or equivalent
- Familiarity with software development in Linux environments using a variety of programming and scripting languages including Java, Python, Go, C/C++, and/or bash
- Familiarity with TCP/IP networking & related protocols (such as HTTP, SSH, IPSEC, TLS/SSL, etc)
- Basic understanding of private and public keys and or certificates
- Experience with version control technologies such as Git
- 5+ years of experience in software engineering
- Red Hat Enterprise, Fedora or Ubuntu Linux operating systems
- 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.
- Experience with security design and architecture of Cross Domain solutions (CDS)
- Agile or Scrum development experience
- Experience with deploying cloud technologies such as MS Azure or AWS
- Development experience in a distributed, parallel or clustered processing environment
- Experience with virtual desktop redisplay technologies such as RDP, Citrix Receiver or VMware Horizon View
- Experience with thin-client usage, management & deployment scenarios
- Experience developing cloud-based technologies on Microsoft Azure or Amazon AWS
Everfox provides defense-grade cybersecurity platforms for government, defense, intelligence, and regulated sectors. It secures cross-domain data access, threat protection, and insider-risk management through Cross-Domain Solutions, Content Disarm & Reconstruction, and Insider Risk Analytics. Since acquiring Garrison Technology, it adds hardware-enforced security (hardsec) using FPGA to protect air-gapped environments and enable multi-domain access on one device. Backed by 25+ years in the field and now independent under TPG, Everfox aims to protect critical data and networks, reduce insider and external threats, and simplify secure cross-domain access.
Company Size
501-1,000
Company Stage
Seed
Total Funding
$8.1M
Headquarters
Herndon, Virginia
Founded
2023
Simplify's Take
What believers are saying
- Antillion partnership embeds cybersecurity in PACE AIR and FRONTIER edge platforms.
- Palantir collaboration enables real-time AI-driven intelligence from multi-sensors.
- CYBER360 report shows 94% FSB cyberattack rate, boosting insider risk demand.
What critics are saying
- Palantir dominates defense AI, forcing Everfox commoditization in 12-24 months.
- TPG's $2.45B debt demands growth, triggering R&D cuts in 12-18 months.
- Garrison UK hardsec faces U.S. export controls, stranding value in 6-18 months.
What makes Everfox unique
- Everfox delivers Cross-Domain Solutions for secure data transfer across classification levels.
- Garrison acquisition integrates FPGA-based hardsec for air-gapped network protection.
- Insider Risk Solutions provide user activity monitoring against internal threats.
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Benefits
Health Insurance
Unlimited Paid Time Off
401(k) Company Match
Growth & Insights and Company News
6 month growth
↑ 0%1 year growth
↑ 0%2 year growth
↑ 4%Antillion enters partnership to secure & expand deployable edge capabilities. A new partnership between Antillion and Everfox will integrate high-assurance cybersecurity into rugged hardware platforms for mission-critical data protection By Olivia Hannam / 31 Mar 2026 Antillion has recently secured a new partnership with Everfox to expand secure, deployable capabilities at the edge for defence and security sectors. Through this collaboration, Antillion will serve as an Everfox systems integrator. The partnership focuses on combining Antillion's edge hardware platforms with Everfox's trusted technologies to deliver integrated solutions tailored for complex operational environments. Everfox specializes in high-assurance cybersecurity and cross-domain solutions, supporting government and defence customers globally. Their technology enables secure data movement, access, and protection across various classification boundaries. These capabilities allow organizations to operate effectively in mission-critical settings where security and trust are essential. The integration will see Everfox capabilities embedded into Antillion's PACE AIR and FRONTIER platforms. These hardware systems are specifically engineered for constrained, remote, and operational environments. By merging these technologies, the companies aim to bring secure processing closer to the point of need, extending the value of rugged hardware with proven cyber and cross-domain functionality. This collaboration reflects a shared focus on delivering deployable, usable technology that performs under real-world conditions. Together, Antillion and Everfox are positioned to support the evolving requirements for secure edge computing across the defence sector and related industries. Joint solutions are currently in development. Edge Computing Solutions for Mission-Critical Defense, First Responder & Security Applications Rio House, 715 Waterside Drive, Aztec West, Bristol BS32 4UD United Kingdom Regional Offices
Everfox has selected Anduril's Voyager platform as its preferred edge server hardware platform, enabling data and AI-driven workflows to reach U.K., U.S., NATO and allied warfighters faster and more securely.
Everfox, a global high-assurance cybersecurity leader, today released new research exposing how financial services and banking (FSB) organisations are struggling to combat increasingly sophisticated attacks. However, the complexities of regulatory compliance are presenting a barrier to adopting the preventative security measures security leaders believe will be the answer.The CYBER360 report reveals FSB organisations are facing 114 cyberattacks each week with 94% of organisations having fallen victim to a cyberattack over the past 12 months. Phishing attacks (28%), compromised access credentials (25%) and DDoS attacks (24%) were revealed to be the most common attack types. And on average, these organisations paid more than $531,000 on the recovery costs of a cyberattack. But it’s not just the volume of cyberattacks which poses a concern to industry security leaders. 68% of FSB organisations believe that the sophistication of cyberattacks is increasing year on year. A complicating factor is that this risk is not only presented by external actors; one in three security leaders in FSB organisations identify insider threats as a top security concern. Sean Berg, CEO at Everfox, commented “The sophistication of threats posed by external and internal threat actors puts security leaders in financial services organisations under immense pressure. Not only is this translating into real financial losses through the costs of recovering from such attacks, but the heightened regulatory environment adds to this pressure
By integrating Everfox's cross-domain solutions with Palantir's AI-driven analytics, this collaboration will provide warfighters with real-time intelligence from multiple sensors, platforms, and networks - ensuring a seamless, unified data environment.
Everfox, a global high-assurance cybersecurity leader, today released new research exposing how financial services and banking (FSB) organisations are struggling to combat increasingly sophisticated attacks. However, the complexities of regulatory compliance are presenting a barrier to adopting the preventative security measures security leaders believe will be the answer.The CYBER360 report reveals FSB organisations are facing 114 cyberattacks each week with 94% of organisations having fallen victim to a cyberattack over the past 12 months. Phishing attacks (28%), compromised access credentials (25%) and DDoS attacks (24%) were revealed to be the most common attack types. And on average, these organisations paid more than $531,000 on the recovery costs of a cyberattack.But it’s not just the volume of cyberattacks which poses a concern to industry security leaders. 68% of FSB organisations believe that the sophistication of cyberattacks is increasing year on year. A complicating factor is that this risk is not only presented by external actors; one in three security leaders in FSB organisations identify insider threats as a top security concern.Sean Berg, CEO at Everfox, commented “The sophistication of threats posed by external and internal threat actors puts security leaders in financial services organisations under immense pressure