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Duncan Greatwood

Duncan Greatwood is the CEO of Xage Security, overseeing all facets of the business including corporate positioning, product and market strategy, organizational development and go-to-market acceleration. Prior to Xage, Duncan was an executive at Apple, leading search-technology projects and products. Previous to Apple, Duncan was C.E.O. of Topsy, the pioneer in social media search and analytics acquired by Apple in 2013. Prior to Topsy, he was founder and C.E.O. of PostPath, the email and security company that was acquired by Cisco. Previously, Duncan held sales and marketing Vice President roles at Virata / Globespan / Conexant, as well as earlier engineering and marketing positions at Madge Networks. Duncan holds a B.A. (Mathematics) and M.Sc. (Computer Science) from Oxford University and an M.B.A. from London Business School.

Top 10 Enterprise Security Risks of Agentic AI
What Are the Top 10 Enterprise Security Risks of Agentic AI? AI SecurityAll BlogsZero Trust
July 23, 2026

What Are the Top 10 Enterprise Security Risks of Agentic AI?

Reading Time: 9 min read Executive Summary Agentic AI is rapidly moving from experimentation into enterprise workflows. Unlike AI assistants, AI agents can take actions, access systems, execute commands, use…
Duncan Greatwood
AI Agent
How Do You Secure OpenClaw Against Prompt Injection? AI SecurityAll BlogsZero Trust
June 2, 2026

How Do You Secure OpenClaw Against Prompt Injection?

AI agents such as OpenClaw can automate complex workflows by interacting with tools, data sources, and external systems on a user's behalf. While these capabilities improve productivity, they also create…
Duncan Greatwood
Beyond Claude Mythos
Beyond Claude Mythos: Securing critical systems when the grace period hits zero AI SecurityAll BlogsCritical InfrastructureZero Trust
May 14, 2026

Beyond Claude Mythos: Securing critical systems when the grace period hits zero

On the heels of Anthropic’s Claude Mythos Preview and GPT-5.4-Cyber, excitement and apprehension are both on the rise when it comes to AI. On one hand, these tools offer a generational leap in cybersecurity…
Duncan Greatwood
AI-Powered Cyber Attacks
AI-Powered Cyber Attacks Are Raising the Stakes for Critical Infrastructure Security AI SecurityAll BlogsCritical InfrastructureCyber-Physical Systems ProtectionIndustrial CybersecurityZero Trust
April 14, 2026

AI-Powered Cyber Attacks Are Raising the Stakes for Critical Infrastructure Security

Critical infrastructure operators have always lived with a hard truth: some of the systems that matter most are the hardest to patch. In enterprise IT, the standard answer to a…
Duncan Greatwood
Meta AI Incident
Rogue by Design: What Meta’s AI Incident Reveals About Agent Security AI SecurityAll BlogsCyber NewsZero Trust
March 20, 2026

Rogue by Design: What Meta’s AI Incident Reveals About Agent Security

A recent incident at Meta highlights a growing gap in how organizations are securing AI agents. As these systems become more capable and more deeply integrated into enterprise workflows, their…
Duncan Greatwood
The Convergence of Cyber and Physical Threats
The Convergence of Cyber and Physical Threats: A New Reality for Energy Security All BlogsCritical InfrastructureIndustrial CybersecurityZero Trust
March 5, 2026

The Convergence of Cyber and Physical Threats: A New Reality for Energy Security

Recent strikes on energy infrastructure in the Middle East, such as the drone attacks on liquefied natural gas (LNG) production in Qatar, highlight a difficult reality for the global energy…
Duncan Greatwood
Securing the Energy Supply Chain for AI
Securing the Energy Supply Chain for AI AI SecurityAll BlogsCritical InfrastructureIndustrial CybersecurityZero Trust
February 23, 2026

Securing the Energy Supply Chain for AI

Artificial intelligence has become a core driver of U.S. innovation, and is increasingly treated as part of the nation’s critical infrastructure. Its impact spans economic growth and productivity, national security…
Duncan Greatwood
AI-on-AI Hacking
AI-on-AI Hacking: Winning The New Cybersecurity Battle AI SecurityAll BlogsZero Trust
January 19, 2026

AI-on-AI Hacking: Winning The New Cybersecurity Battle

Duncan Greatwood, CEO, Xage Security The democratization of AI makes for an exciting moment where rapid change feels possible, but it should also give security teams pause. By lowering barriers…
Duncan Greatwood
AI Agents, Zero Trust, and the New Identity Paradigm
AI Agents, Zero Trust, and the New Identity Paradigm AI SecurityAll BlogsZero Trust
December 2, 2025

AI Agents, Zero Trust, and the New Identity Paradigm

Author: Duncan Greatwood, CEO, Xage Security Agentic AI is 2025’s hottest tech topic — and yet AI agents are being held back by the risks. Fears of rogue behavior abound,…
Duncan Greatwood
AI Espionage
Anthropic’s AI Espionage Disclosure Marks a New Era. Zero Trust Must Be the Response. AI SecurityAll BlogsCyber NewsZero Trust
November 17, 2025

Anthropic’s AI Espionage Disclosure Marks a New Era. Zero Trust Must Be the Response.

Author: Duncan Greatwood, CEO, Xage Security On November 13, 2025, Anthropic released its report, “Disrupting the first reported AI-orchestrated cyber espionage campaign,” marking the first confirmed example of a fully…
Duncan Greatwood
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