Senior Manager, Customer Success

Get to Know Us Horizon3 is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find, 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 IT Ops/SecOps teams, consulting pentesters, and MSSPs and MSPs. We are a fusion of former U.S. Special Operations cyber operators, startup engineers & operators, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems: ineffective security tools and 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.

Horizon3 is on a mission to help organizations find, fix, and verify exploitable attack paths - before attackers can. As we scale our impact with global enterprises and managed service providers, we're looking for a mission-driven, people-first Manager of Customer Success to lead and grow a high-performing team of CSMs supporting our enterprise, federal, and MSSP customers. This is a people leadership role first and foremost. You’ll serve as a coach, strategist, and operator, driving performance across the team while directly influencing customer outcomes. You’ll ensure our customers realize value from NodeZero, champion their success internally, and help define what world-class customer success looks like at Horizon3.

Horizon3 is on a mission to help organizations find, fix, and verify exploitable attack paths before attackers can. As we continue to scale across enterprise, federal, and managed security service provider (MSSP) customers, we're looking for a mission-driven, people-first Senior Manager, Customer Success to lead and develop a high-performing team of Customer Success Managers. This is a people leadership role first and foremost. You'll serve as a coach, operator, and strategic leader, helping your team build trusted relationships with security leaders while ensuring customers successfully operationalize NodeZero as a core component of their security program. You'll drive customer outcomes, influence product adoption, and help define what world-class Customer Success looks like at Horizon3. Lead & Develop the Team Lead, coach, and develop a team of Customer Success Managers supporting Enterprise, Federal, and MSSP customers. Foster a culture of ownership, accountability, continuous learning, and customer obsession while helping your team grow as trusted advisors to security practitioners and executive stakeholders. Drive Security Outcomes & Platform Adoption Ensure customers successfully operationalize NodeZero across enterprise, cloud, and hybrid environments. Partner with customers to integrate autonomous pentesting into vulnerability management, exposure management, remediation validation, and broader security operations workflows, driving measurable improvements in security posture and risk reduction. Own Strategic Customer Relationships Build trusted relationships with CISOs, security executives, security architects, vulnerability management teams, SOC leaders, and other technical stakeholders. Align customer success plans to strategic security initiatives, executive priorities, and measurable business outcomes. Enable Expansion & Retention Partner with your team to identify opportunities for broader platform adoption across business units, attack surfaces, and security use cases while