[Hiring] Senior Customer Success Manager @Horizon3 AI

Role Description

As a Customer Success Manager in EMEA, you will play a key role in scaling and strengthening our international post-sales experience as part of a growing global Customer Success organization. You will serve as a strategic advisor to a portfolio of high-value customers, partnering directly with technical and business stakeholders to drive adoption, value realization, retention, and growth.

This role requires a background in cybersecurity and someone who is consultative, proactive, and excited to build strong customer relationships across geographies. You’ll collaborate cross-functionally with Sales, Product, Engineering, and Support while helping shape and evolve the Customer Success experience across the EMEA region.

We are open to candidates based in the following locations: UK, Germany, France, Belgium, Ireland, Italy, The Netherlands or Spain.

Responsibilities

• Manage a portfolio of EMEA customers as their primary post-sales technical advisor, developing a deep understanding of the NodeZero platform to guide successful adoption.
• Cultivate champions with security leaders—from analysts to CISOs—and guide them through the lifecycle of adoption, expansion, and advocacy.
• Deliver technical onboarding and enablement to drive adoption of NodeZero, including advanced features like Tripwires, Insights, and Rapid Response, ensuring customers realize maximum value.
• Proactively identify customer needs and potential challenges, suggesting solutions that improve their experience and enhance their cybersecurity posture.
• Partner closely with IT and Security teams (SOC, red/blue teams, AppSec, etc.) to help interpret pentest results, prioritize remediation, and guide long-term offensive security strategy.
• Collaborate closely with Sales and Renewals teams to drive retention and growth by identifying expansion opportunities, aligning on account strategy, and ensuring a seamless renewal process.
• Act as a customer advocate, relaying customer feedback and technical issues to our internal teams to help drive the evolution of our product and services.
• Conduct regular check-ins and quarterly business reviews to align on strategy, secure executive buy-in, and showcase business outcomes.
• Contribute to documentation, training materials, and repeatable playbooks to scale technical success across the region.
• Maintain detailed records of customer health and touchpoints using internal CS platforms.

Qualifications

• 5+ years in Customer Success, Technical Account Management, Client Services, within a SaaS cybersecurity environment.
• In-depth knowledge of cybersecurity practices and principles; possession of relevant certifications (e.g., CompTIA Security+, CISSP) is highly preferred.
• Deep understanding of enterprise security, information technology, cloud, or offensive security is highly preferred.
• Strong customer acumen—able to align solutions to business priorities and present clearly to both technical and executive stakeholders.
• Experience managing a book of business with revenue targets (ARR, NRR, GRR).
• Startup or high-growth company experience is preferred; you thrive in fast-paced, ambiguous environments.
• Languages Preferred: French, German, Italian as well as business fluency in English.
• Comfortable with tools like Salesforce, Gainsight, and JIRA; detail-oriented and organized.

Benefits

• 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.