Key points
- Keith Poyser was promoted to General Manager, EMEA, by Horizon3 in October 2026.
- The regional team grew from eight to more than 110 employees under his leadership.
- Horizon3 reported more than 260% revenue growth in the last fiscal year for the region.
The short version
- Horizon3 appointed Keith Poyser as the new General Manager for its EMEA operations.
- The company cited a 260% increase in regional revenue as a driver for the promotion.
- The EMEA staff count has risen from eight to over 110 people since Poyser joined.
The details
Horizon3 announced the promotion of Keith Poyser to General Manager, EMEA, on 13 October 2026. Previously serving as Vice President for the region, Poyser will now oversee the company’s expansion across Europe, the Middle East and Africa. This leadership change follows a period of significant financial performance, with the company reporting more than 260% revenue growth in the last fiscal year for the region. The promotion coincides with the opening of Horizon3’s EMEA headquarters in Amsterdam.
Poyser joined Horizon3 in September 2024 and has since rebuilt the regional workforce. According to the company, he grew the EMEA team from eight employees to more than 110. He also established a regional leadership bench to support the expanding business. Snehal Antani, CEO and co-founder of Horizon3, stated that Poyser built the leadership structure alongside the headcount growth. Antani emphasized that the company needs leaders who can grow the business while giving teams authority and accountability.
The context
Horizon3 provides NodeZero, an autonomous security testing platform. The product is designed to demonstrate exploitable attack paths and verify that remediation efforts close those paths. This allows security and IT teams to focus resources on proven risk reduction. The company describes itself as an AI-native proactive security firm that uses AI to test defenses at machine speed.
Poyser brings more than 20 years of experience scaling technology businesses. His previous roles include leadership positions at SentinelOne, Palo Alto Networks and IBM. He stated that AI-enabled attackers are moving faster, requiring organizations to routinely find and fix exploitable weaknesses. His priority as General Manager is to extend the company’s reach across the region while keeping customer outcomes central to growth.
What to watch
- Monitor Horizon3’s expansion activities in the EMEA region for new partnerships or office openings.
- Watch for updates on NodeZero’s capabilities, particularly regarding AI-driven attack simulation.
- Track the company’s hiring trends in Europe, the Middle East and Africa as the team scales further.
What it means for organisations
Organisations using Horizon3 services should review their current support structures and account management contacts. A leadership change often brings shifts in strategic priorities and resource allocation. Teams should verify that service level agreements remain stable and that existing integration points with security operations are unaffected. It is prudent to schedule a review with the new regional leadership to align on future product roadmaps. Internal stakeholders, including CISOs and procurement teams, should be informed of the change to ensure continuity in vendor relationships and contract renewals.
What to do and how to stay safe: Horizon3
- Review current vendor contracts to ensure alignment with new regional leadership structures.
- Verify that support channels and escalation paths remain consistent with previous agreements.
- Assess whether the vendor’s expansion plans impact service availability in your specific geography.
- Schedule a strategic review with the new account leadership to discuss upcoming product features.
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General security guidance from the TechSec Headlines newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
Who is the new General Manager for Horizon3's EMEA region?
Keith Poyser was promoted to General Manager, EMEA, by Horizon3 in October 2026.
How much did Horizon3's revenue grow in the EMEA region?
The company reported more than 260% regional revenue growth in the last fiscal year.
How large is the Horizon3 EMEA team now?
The team has grown from eight to more than 110 employees since Poyser joined in 2024.
