Commercial Sales Engineer

Get to Know Us

Horizon3.ai is a fast-growing cybersecurity company on a mission to help organizations proactively find, fix, and verify exploitable attack vectors before adversaries exploit them. Our flagship platform, NodeZero™, delivers production-safe autonomous pentesting and attacker-centric validation across internal, external, cloud, and hybrid environments.

We are a fusion of former U.S. Special Operations cyber operators, startup engineers, and cybersecurity practitioners who were tired of ineffective tools, alert fatigue, blind spots, and “checkbox security.” We operate with a culture of respect, collaboration, ownership, and results, and we’re looking for sellers who thrive in fast-moving, high-growth environments.

We’re looking for an ambitious Commercial Sales Engineer who is early in their career and excited to learn quickly, work with cutting-edge technology, and make an impact in a customer-facing role. This is a great opportunity to accelerate your career while helping growing organizations modernize their security programs.

Why This Role is Exciting

• Work with Cutting-Edge Technology – Gain hands-on experience with NodeZero, an autonomous pentesting platform changing the cybersecurity landscape.

• Learn from Industry Experts – Partner with experienced Account Executives, Sales Engineers, Customer Success leaders, and security professionals who will invest in your growth.

• Fast Career Growth – Build the technical, business, and customer-facing skills that can quickly accelerate your Sales Engineering career.

• Make Immediate Impact – Help customers solve real security challenges and directly influence revenue growth.

• Join a High-Energy Team – Be part of a collaborative, mission-driven company reshaping offensive security.

What You’ll Do

Support Commercial Sales Growth

• Partner closely with Account Executives to drive opportunities across small and mid-sized organizations by supporting discovery, demos, and technical evaluations.

Learn Customer Environments

• Join customer conversations to understand their infrastructure, security maturity, and business priorities.

Deliver Powerful Demos & Proof of Value

• Show prospects how NodeZero helps identify real attack paths, validate security controls, and reduce risk.

Simplify Complex Security Concepts

• Translate technical capabilities into clear business value for both technical buyers and executive stakeholders.

Grow as a Trusted Advisor

• Develop the confidence to answer customer questions, guide conversations, and help move deals forward.

Collaborate Across Teams

• Work with Sales, Product, Marketing, and Customer Success to improve customer experience and share market feedback.

Continuously Build Expertise

• Learn modern cybersecurity concepts, offensive security methodologies, and consultative selling skills from experienced mentors.

What You’ll Bring

• 1–4 years of experience in Sales Engineering, Customer Success, Technical Account Management, or another customer-facing technical role

• Strong interest in cybersecurity and desire to build a long-term career in the space

• Excellent communication skills with the ability to simplify technical topics

• High curiosity, coachability, and eagerness to learn

• Ability to thrive in a fast-paced, high-growth environment

• Based in Chicago or open to relocating there

What Success Looks Like

• You become a trusted partner to Account Executives and help win new business

• You confidently deliver compelling demos and support evaluations

• You rapidly grow your technical and commercial skill set

• You build strong relationships internally and externally

• You establish yourself as a rising Sales Engineer in one of cybersecurity’s most innovative companies

Perks of Horizon3.ai

• Inclusive Team: We value diversity and promote an inclusive culture where everyone can thrive.

• Growth Opportunities: Be part of a dynamic and growing team with numerous career development opportunities.

• Innovative Culture: Work in a collaborative environment that encourages creativity and out-of-the-box thinking.

• Remote Work: We are a 100% remote company. Enjoy the convenience and work-life balance that comes with remote work. 

• 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:

• Total On-Target Compensation: $140,000 - $160,000 70/30 split annually. The exact salary will be determined based on the selected candidate’s location, qualifications, experience, and relevant skills.

• 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

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