Horizon3 Elevates Sundra to CCO to Oversee Six Teams and Boost NodeZero Adoption

Horizon3 has promoted Ellen Sundra to Chief Customer Officer, a move that consolidates six distinct customer-facing functions under single leadership. This appointment affects organizations using the NodeZero platform, as it changes the reporting structure for teams handling sales engineering, support, enablement, renewals and field CTOs. The company states this shift is designed to help customers realize value faster and deepen their adoption of the proactive security platform.

What is the scope of the new role?

Sundra, previously Vice President of Customers, now oversees Sales Engineering, Customer Success, Support, Enablement, Renewals and Field CTOs. According to Horizon3, her expanded remit connects the guidance organizations receive when evaluating NodeZero with the expertise and training they need during platform use. The role focuses on helping customers achieve measurable security outcomes through repeatable testing and informed remediation.

Why did Horizon3 make this change?

The promotion recognizes Sundra’s work in combining technical expertise with customer advocacy across Horizon3’s teams. CEO Snehal Antani noted that Sundra helped build processes necessary to scale pre-sales and post-sales support for the more than 7,000 companies relying on Horizon3. The appointment reinforces customer success as central to the company’s growth strategy, emphasizing lasting partnerships, retention and revenue expansion.

How does this impact NodeZero users?

Sundra’s organization will assist customers in putting NodeZero evidence to work through verification and expanding platform use as security needs evolve. NodeZero safely proves which exposures attackers can exploit and whether fixes close demonstrated attack paths. Sundra stated her focus is on helping teams become confident users who can turn findings into verified fixes, thereby reducing risk through long-term partnerships.

Questions to ask your suppliers

Security operations teams should verify whether this leadership change alters the chain of command for critical support requests. Check if your primary technical contacts remain the same or if new points of contact have been assigned. Determine whether service level agreements for incident response or feature requests need updating.

Ensure your internal vendor management records reflect the new executive overseeing customer success. Discuss with procurement whether this structural shift impacts contract renewal terms or support scope. Notify risk management teams of any changes to vendor stability indicators. Confirm that training materials and enablement resources are still aligned with your current deployment version.

What to do and how to stay safe: Horizon3

• Review your current support ticket history to ensure no pending issues are affected by the leadership transition.
• Confirm that your designated technical account managers are still active and reachable through existing channels.
• Update internal vendor profiles with the new Chief Customer Officer’s name and scope of responsibility.
• Monitor official vendor communications for any changes to support hours or escalation procedures.

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Frequently asked questions

Who is the new Chief Customer Officer at Horizon3?

Ellen Sundra has been promoted to Chief Customer Officer at Horizon3.

Which teams does Ellen Sundra now oversee?

She oversees Sales Engineering, Customer Success, Support, Enablement, Renewals and Field CTOs.

When was this promotion announced?

Horizon3 announced the promotion on October 14, 2026.