Sundra will bolster Horizon3.ai’s community-focused approach to customer service and product design.

Horizon3.ai, a global leader of autonomous security solutions, today announced that Ellen Sundra has joined the company as Vice President, Customers. In her new role, Ellen will lead Horizon3.ai’s Customer Success, Sales Engineering, and Community Engagement teams. With more than two decades of experience in customer-focused leadership roles within the technology and cybersecurity industries, Ellen will further enhance the company’s ability to deliver unparalleled value to its growing customer base.

Ellen joins Horizon3.ai after a 14-year tenure at Forescout Technologies, where she most recently served as Chief Customer Officer. Her expertise in organizational transformation, public speaking and community-building will add new strategic layers to Horizon3.ai’s customer-centric approach, while strengthening team cohesion and engagement.

“We are excited to welcome Ellen to the Horizon3.ai leadership team,” said Matt Harley, CRO at Horizon3.ai. “Her exceptional track record of driving customer success, partnering with R&D to drive customer-centric innovation, and building Community will be pivotal as we continue to scale globally. With NodeZero empowering organizations to identify, prioritize, and remediate exploitable vulnerabilities, Ellen’s leadership will ensure our customers and partners achieve measurable, impactful security outcomes while fostering a vibrant cybersecurity community.”

At Horizon3.ai, Ellen will lead initiatives that bridge the gap between Horizon3.ai’s NodeZero™ autonomous security platform and customer needs, ensuring organizations are leveraging the platform to its fullest potential. With her guidance, the Customer Success team will continue to provide comprehensive support, while the Sales Engineering and Community Engagement teams strengthen their connections with prospects, users and industry professionals.

“I am honored to join Horizon3.ai at such an exciting time in its journey,” said Ellen. “NodeZero is reinventing the cybersecurity status quo, keeping organizations consistently one step ahead of the latest security threats, and my new role puts me on the front lines of this industry-shaping transformation. I look forward to working with this exceptional team to deepen our partnerships with customers, foster a thriving community of security leaders and ensure we always exceed expectations when helping our partners to strengthen their cybersecurity posture.”

Ellen holds a BA in Computer Science from Rollins College and has completed Executive Leadership training at Harvard Business School. She has received numerous industry honors for her influence and leadership, including Top 25 Women in Cyber, (Cyber Defense Magazine), CyberSecurity Veteran Honoree (SC Media), Top Women in CyberSecurity (Global InfoSec Awards RSA Conference) and Forescout MVP of the Year.

About Horizon3.ai

Horizon3.ai's NodeZero™ Autonomous Security Platform delivers integrated threat detection, autonomous pentesting, third-party risk management, and GRC capabilities through NodeZero Insights™. The platform identifies and helps organizations remediate vulnerabilities while deploying deception-based threat detection with NodeZero Tripwires™. Founded in 2019 by industry and U.S. National Security veterans, Horizon3.ai leads in cybersecurity innovation.

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