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Commercial Account Executive, UK

Horizon3

Amsterdam
Full-time
5-10 years experience
Hybrid

Work Arrangement

Office Days per Week: 3 days

Key Skills

Cybersecurity sales
Channel partnerships
Salesforce
Pipeline management
Negotiation
Deal closure
Proof of value
Challenger sales methodology
Outreach
LinkedIn Sales Navigator
ZoomInfo
Slack
Technical demonstration
Forecasting
Relationship management

Job Description

Get to Know Us

Horizon3.ai is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organisations 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 organisations 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.

Role Description

Help shape the next stage of Horizon3.ai’s UK growth. Based in the Netherlands with regular UK travel, you’ll bring autonomous pentesting to new customers and help them reduce real-world security risk. If you thrive on opening doors, building partnerships and turning opportunities into wins, this is a chance to make a visible impact as we expand our UK Commercial team.

We currently require our Amsterdam team to come to the office 2 - 3 days per week.

What You’ll Do

Grow Horizon3.ai’s UK Commercial business by winning new customers, developing productive channel partnerships and helping organisations realise value from our cybersecurity solutions.

  • Win new accounts and expand our customer base by introducing disruptive cybersecurity software solutions to the UK market.

  • Build and convert a qualified pipeline, owning the sales cycle from qualification and proof of value through negotiation and close, with the goal of exceeding quota consistently quarter over quarter.

  • Turn channel partnerships into revenue by proactively engaging regional resellers and developing joint opportunities.

  • Demonstrate Horizon3.ai solutions in virtual and in-person meetings, connecting technical capabilities to customer needs and business outcomes.

  • Drive the post-proof of value ROI process, helping customers understand business value while building relationships that support satisfaction and retention.

  • Maintain accurate customer records, pipeline data and forecasts in Salesforce so opportunities, risks and next steps are clearly understood.

  • Work independently to progress opportunities while collaborating with distributed sales, support and customer success teams to deliver a coordinated customer experience.

What You’ll Bring

  • At least 5 years of successful cybersecurity sales experience, with a track record of driving growth, introducing disruptive software solutions and consistently exceeding quarterly quotas.

  • Previous experience selling technical solutions into the UK market.

  • Experience establishing and monetising channel partnerships; existing relationships with key regional resellers are essential.

  • Proficiency across the full sales process, including qualification, proof of value, forecasting, negotiation, deal closure and post-proof of value ROI management.

  • The ability to present and demonstrate cybersecurity solutions effectively, both virtually and in person.

  • Strong CRM discipline and experience maintaining accurate pipeline records and forecasts in Salesforce (SFDC).

  • Familiarity with Challenger Question-Based Selling-type methodologies and sales tools such as Outreach, LinkedIn Sales Navigator, ZoomInfo and Slack.

  • The ability to work independently and collaborate effectively with distributed teams.

  • Fluency in English; additional language skills are welcomed.

Travel Required

We are a hybrid company, and this job will require you to spend 3 days based at our Amsterdam city centre sales hub. The role may require up to 40% of travel within the assigned territory to be successful. Job-related travel expenses are reviewed and must be approved by your manager.

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 flexibility to work in the way that supports you and brings out your best.

  • 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.

You Belong Here

Horizon3.ai 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.ai, 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.ai, 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.

Core Responsibilities

Drive the growth of the UK commercial business by winning new accounts and developing productive channel partnerships. Manage the full sales cycle from qualification and proof of value to negotiation and closing while maintaining accurate pipeline data in Salesforce.

Requirements

Requires at least 5 years of successful cybersecurity sales experience with a proven track record of exceeding quotas. Candidates must have experience selling technical solutions in the UK market and establishing channel partnerships.

Benefits

  • Health insurance
  • Vision insurance
  • Dental insurance
  • Flexible vacation policy
  • Generous parental leave
  • Equity

About Horizon3

Industry: Computer and Network Security

Company size: 501-1,000 employees

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.

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