Key points
- Ellen Sundra moves from VP of Customers to Chief Customer Officer at Horizon3.
- Her new role oversees Sales Engineering, Support, Enablement, Renewals and Field CTOs.
- The change aims to link pre-sales guidance with post-sales support for NodeZero users.
The short version
- Horizon3 promoted Ellen Sundra to Chief Customer Officer in October 2026.
- She now leads six distinct customer-facing teams including Sales Engineering and Support.
- The company states this structure helps customers achieve measurable security outcomes faster.
The details
Horizon3 announced on October 14, 2026, that Ellen Sundra has been promoted to Chief Customer Officer. According to the company, Sundra previously served as Vice President of Customers. Her expanded leadership scope now covers Sales Engineering, Customer Success, Support, Enablement, Renewals, and Field CTOs. This consolidation places all major customer interaction points under a single executive leader.
Sundra’s appointment is designed to connect the technical guidance organizations receive during the evaluation of NodeZero with the training and support required for ongoing platform use. Horizon3 states that this alignment helps customers realize value more quickly. The move reinforces customer success as a central pillar of the company’s growth strategy, focusing on retention and long-term partnerships.
Snehal Antani, CEO and co-founder of Horizon3, noted that Sundra’s technical expertise and customer empathy helped build the processes needed to scale support. According to Antani, these efforts have resulted in strong retention and revenue expansion metrics for the more than 7,000 companies using Horizon3. The promotion recognizes Sundra’s role in cultivating advocates for the brand and product.
The context
Sundra joined Horizon3 in December 2024. Before her current role, she spent nearly 15 years at Forescout, where she advanced from Federal Systems Engineer to Chief Customer Officer. Her background includes building customer-focused teams and working across practitioners, executives, and boards. This experience combines deep cybersecurity knowledge with operational leadership.
NodeZero, Horizon3’s AI-Native Proactive Security Platform, autonomously tests defenses to uncover exploitable attack paths. The platform allows organizations to verify fixes and drive a continuous hack, fix, verify loop. Sundra’s organization will help customers use this evidence through repeatable testing and informed remediation.
Horizon3 reports that more than 7,000 organizations, including global defense agencies and Fortune 10 enterprises, use its platform. The company was recently named the Fastest Growing Cybersecurity Company in North America by Deloitte and one of the Most Innovative companies by Fast Company in 2026.
What to watch
- Monitor how the unified customer team structure affects response times for NodeZero support tickets.
- Watch for changes in customer success metrics or retention rates reported by Horizon3 in future quarters.
- Observe if Sundra’s leadership leads to new features or integrations driven by direct customer feedback.
What it means for organisations
When a vendor consolidates customer-facing roles, organizations should verify that their primary points of contact remain clear and accessible. Teams usually benefit from knowing whether pre-sales engineering and post-sales support are now coordinated, which can reduce friction during deployment. Check whether your organization’s account management structure aligns with these internal changes. Ensure that stakeholders in security and operations understand how to request guidance, as unified teams often streamline communication channels. Confirm that service level agreements still reflect the expected responsiveness for critical security findings.
What to do and how to stay safe: Horizon3
- Review your current engagement model with Horizon3 to see if the new reporting structure changes your primary contacts.
- Verify that your organization’s NodeZero usage aligns with the updated support and enablement resources offered.
- Communicate with your vendor representative to understand how the unified team may affect future feature roadmaps.
- Ensure internal stakeholders are aware of any potential shifts in support processes or escalation paths.
Step-by-step guide: Secure Home Routers for Small Business Networks
General security guidance from the TechSec Headlines newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
Who replaced the previous Chief Customer Officer at Horizon3?
The source material does not state who held the Chief Customer Officer role before Ellen Sundra or if the position was previously vacant.
When did Ellen Sundra join Horizon3?
Sundra joined Horizon3 in December 2024, according to the company announcement.
What specific teams does Sundra now oversee?
She oversees Sales Engineering, Customer Success, Support, Enablement, Renewals, and Field CTOs.
