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All Posts By

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.

How identity-based safeguards protect AI interactions
Zero Trust: A Proven Solution for the New AI Security Challenge AI SecurityAll BlogsZero Trust
October 9, 2025

Zero Trust: A Proven Solution for the New AI Security Challenge

Duncan Greatwood, CEO, Xage Security How identity-based safeguards protect AI interactions As organizations race to unlock the productivity potential of large language models (LLMs) and agentic AI, many are also…
Duncan Greatwood
AI Threats Span the Full Stack
AI Threats Span the Full Stack. Your Security Strategy Should, Too. AI SecurityAll BlogsCyber NewsZero Trust
September 18, 2025

AI Threats Span the Full Stack. Your Security Strategy Should, Too.

Duncan Greatwood, CEO, Xage Security Interplay among the elements of the AI and application stack is the new cybersecurity reality. Key Highlights AI is expanding the attack surface. From user-facing…
Duncan Greatwood
Americas AI Action Plan
Securing the AI Frontier: Why Zero Trust Is Central to “America’s AI Action Plan” AI SecurityAll BlogsCyber NewsZero Trust
August 1, 2025

Securing the AI Frontier: Why Zero Trust Is Central to “America’s AI Action Plan”

Duncan Greatwood, CEO, Xage Security In July 2025, the White House released a new document titled Winning the Race: America’s AI Action Plan, outlining the United States’ comprehensive strategy to…
Duncan Greatwood
Empowering Boards with Cyber Defense Strategies to Tackle Escalating Threats
Boardroom Defense: Questions About Cybersecurity All BlogsCritical InfrastructureCyber-Physical Systems ProtectionIdentity-Based SecurityZero Trust
February 4, 2025

Boardroom Defense: Questions About Cybersecurity

Author: Duncan Greatwood, Executive Chair, Xage Security  How can company boards ensure they are addressing escalating cyber threats? Positioned at opposite ends of the business, board members and security executives…
Duncan Greatwood
What’s Missing From Biden’s Plan to Secure the Power Grid? An Incentive to Change All BlogsCyber NewsGovernment Cybersecurity
August 17, 2021

What’s Missing From Biden’s Plan to Secure the Power Grid? An Incentive to Change

By Duncan Greatwood, CEO, Xage   Following a series of devastating ransomware attacks, the Biden Administration is keen to improve the nation’s cybersecurity posture. Without the proper incentives, however, their…
Duncan Greatwood
Edge Computing: Beyond The Cloud All BlogsCyber News
August 17, 2018

Edge Computing: Beyond The Cloud

Duncan Greatwood | Xage Security A decade ago, the shift to centralized, cloud I.T. ushered in a new era of computing, helping companies avoid constant – and costly – investments…
Duncan Greatwood
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          • Read the Report »
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          • Zero Trust for Data Centers & IT
          • Zero Trust Access
          • VPN Replacement
          • Vendor Access Management
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          • Download the eBook »
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