Federal Sales Engineer, DoW
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Horizon3
Washington, DC, US
Summary
The Sales Engineer will demonstrate cybersecurity solutions to prospects, conduct proof of concepts, and assist the sales team in technical positioning. They will also act as a feedback loop to the product team and provide technical support for RFPs and RFIs.
Job Description
Get to Know Us
Horizon3 is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find and fix and verify exploitable attack vectors before criminals exploit them. Our flagship product, the NodeZeroTM platform, delivers production-safe autonomous pentests and other key assessment operations that scale across the largest internal, external, cloud, and hybrid cloud environments. NodeZero has been adopted by organizations of all sizes, from small educational institutions to government agencies and Global 100 enterprises. It is used by ITOps/SecOps teams, consulting pentesters, and MSSPs and MSPs.
We are a fusion of former U.S. Special Operations cyber operators, startup engineers, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems: ineffective security tools, false positives resulting in alert fatigue, blind spots, "checkbox” security culture, cybersecurity skills shortage, and the long lead time and expense of hiring outside consultants. Collectively, we are a team of learn it alls, committed to a culture of respect, collaboration, ownership, and results.
What You’ll Do
Horizon3AI is committed to defending businesses from the ever-growing threat landscape. Our advanced solutions and expert team provide unparalleled security for our clients. We are looking for a passionate Sales Engineer (SE) based in the Washington, DC Region to join our Federal Team and help prospects and clients understand the true value and capabilities of our product(s) and services.
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Technical expertise - Must demonstrate deep knowledge of our cybersecurity products and services, assisting the sales team in presenting and position them to prospects and clients.
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Customer engagement - Must meet with potential customers to understand their cybersecurity needs, challenges, and infrastructure, ensuring that our solutions are the perfect fit for them.
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Product demonstrations - Provide live demos and proof of concepts for our cybersecurity solutions, tailoring each demo to the specific needs and concerns of the potential customer.
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Solution development - Will work closely with the sales and product teams to design and refine our solutions based on customer needs.
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Technical training - train the sales team on the technical aspects of our products to enhance their ability to sell more effectively.
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Feedback loop - relay feedback from the field to our product and engineering teams, contributing to the ongoing improvement of our product.
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RFP/RFI assistance - Assist in answering technical sections of RFPs and RFIs.
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Post-sales support - On rare occasions, assist in post-sales processes to ensure the smooth implementation and satisfaction of our customers.
What You’ll Bring
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5+ years of experience as a Pre-Sales Engineer/Solutions Architect, ideally in the cybersecurity domain.
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Experience with DoW Offensive Cyber Operations
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US Federal Clearance (*Must be able to obtain the required Security Clearance and potential granting access to classified information systems)
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Familiarity with managed services delivery models, SOC workflows, SIEM, SOAR, EDR, PTaaS and MDR.
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Proficiency with cloud (AWS, Azure, GCP), identity systems (AD/AAD), and networking fundamentals.
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Strong understanding of cyber threats, risk management, and cybersecurity solutions.
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Excellent verbal and written communication skills.
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Demonstrates ability to simplify complex technical topics for a non-technical audience.
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Highly collaborative with a strong sense of initiative.
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Certifications such as OSCP, OSCE, CISSP, CEH, CompTIA Security+, or cloud security certifications are desirable.
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Bachelor’s degree in Computer Science, Cybersecurity, Information Technology, or equivalent experience.
Federal Travel Required
The desired location is Washington DC, but we are a fully remote company, and this job may require up to 50% of travel to be successful in the region.
Travel will include CONOS & OCONOS as required.
Job-related travel expenses are reviewed and must be approved by your manager.
Perks of Horizon3
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Inclusive Team: We value diversity and promote an inclusive culture where everyone can thrive.
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Growth Opportunities: Be part of a dynamic and growing team with numerous career development opportunities.
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Innovative Culture: Work in a collaborative environment that encourages creativity and out-of-the-box thinking.
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Hybrid & Remote Work: We embrace a mix of remote and hybrid work models depending on role and location, including our Chicago office, where some roles require regular in-office presence.
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Competitive Compensation: We offer competitive salary, equity and benefits. Our benefits include health, vision & dental insurance for you and your family, a flexible vacation policy, and generous parental leave.
Compensation and Values
At Horizon3, we believe that our people are our greatest asset, and our compensation philosophy reflects this core value. We are committed to fostering an environment where all employees feel valued, respected, and rewarded for their contributions. Our compensation structure is designed to be fair, competitive, and transparent, ensuring that every team member is recognized and compensated equitably across roles, levels, and locations.
In accordance with various State’s transparency regulations, we provide the following salary range information for this position:
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$230k - $270k on a 70/30 split annually. The exact salary will be determined based on the selected candidate’s location, qualifications, experience, and relevant skills.
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Additional compensation: All full-time roles are eligible for an equity package in the form of stock options.
You Belong Here
Horizon3 is not just an equal opportunity employer - we are a community that values diversity, equity, and inclusion as fundamental principles of our culture and success. We are dedicated to fostering a workplace where everyone feels welcome and respected, regardless of race, color, religion, sex, national origin, age, disability, veteran status, sexual orientation, gender identity or expression, genetic information, marital status, hair length or any other legally protected status by law.
Our commitment to diversity and inclusion means we strive to attract, develop, and retain a workforce that reflects the varied communities we serve. We believe that diverse perspectives drive innovation and strengthen our ability to create cutting-edge cybersecurity solutions. At Horizon3, every team member is valued and supported in an environment that encourages personal and professional growth.
We welcome candidates from all backgrounds and experiences, and we encourage all qualified individuals to apply. Come be a part of Horizon3, where your unique contributions are recognized, and your potential is limitless.
Other Duties
Please note this job description is not designed to cover or contain a comprehensive listing of activities, duties or responsibilities that are required of the employee. Duties, responsibilities, and activities may change at any time with or without notice.
Application Note
In any materials you submit, you may redact or remove age-identifying information such as age, date of birth, or dates of school attendance or graduation. You will not be penalized for redacting or removing this information.
Horizon3.ai answers the two most important questions in cybersecurity: If someone tried to compromise us, would we hold up? And, how do we withstand the onslaught of AI-powered attacks?
Horizon3.ai’s NodeZero® shifts the advantage from attackers to defenders by giving organizations the power to fight AI with AI. The Proactive Security Platform autonomously tests your defenses at machine speed, safely finds and prioritizes exploitable attack paths, instantly verifies fixes, and drives a continuous loop so you can prove you’re resilient, not just hope you are.
NodeZero, the World’s Best AI Hacker™, was built by an elite team of U.S. cyber veterans and has honed its skills over 225K production-safe tests, more than all manual pentests in history. More than 5,000 organizations including the NSA, CISA, Fortune 100 giants, and major healthcare providers trust Horizon3.ai to prioritize what matters and prove they’re ready for what’s next.
Horizon3.ai has been recognized by Fast Company as one of the World’s Most Innovative Companies in 2026. The company ranked #3 overall on the 2025 Deloitte Technology Fast 500 and was named the #1 cybersecurity company on the Inc. 5000 in 2025. It has also been named to the Fortune Cyber 60 in both 2023 and 2025 and is a two-time Black Unicorn Award winner.
Founded
2019
Company size
501-1,000 employees
Industry
Computer and Network Security
Org type
Privately Held
Headquarters
San Francisco, CA
Horizon3.ai answers the two most important questions in cybersecurity: If someone tried to compromise us, would we hold up? And, how do we withstand the onslaught of AI-powered attacks?
Horizon3.ai’s NodeZero® shifts the advantage from attackers to defenders by giving organizations the power to fight AI with AI. The Proactive Security Platform autonomously tests your defenses at machine speed, safely finds and prioritizes exploitable attack paths, instantly verifies fixes, and drives a continuous loop so you can prove you’re resilient, not just hope you are.
NodeZero, the World’s Best AI Hacker™, was built by an elite team of U.S. cyber veterans and has honed its skills over 225K production-safe tests, more than all manual pentests in history. More than 5,000 organizations including the NSA, CISA, Fortune 100 giants, and major healthcare providers trust Horizon3.ai to prioritize what matters and prove they’re ready for what’s next.
Horizon3.ai has been recognized by Fast Company as one of the World’s Most Innovative Companies in 2026. The company ranked #3 overall on the 2025 Deloitte Technology Fast 500 and was named the #1 cybersecurity company on the Inc. 5000 in 2025. It has also been named to the Fortune Cyber 60 in both 2023 and 2025 and is a two-time Black Unicorn Award winner.
Founded
2019
Company size
501-1,000 employees
Industry
Computer and Network Security
Org type
Privately Held
Headquarters
San Francisco, CA