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 Cul