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Tony Fergusson

Tony Fergusson is CISO in Residence for EMEA at Zscaler and a respected cybersecurity strategist with more than 25 years of experience across security, networking and IT leadership. An early Zero Trust pioneer, he began applying its principles in enterprise environments in 2015, before the model became mainstream. He was the first Zscaler customer to deploy Zscaler Private Access and among the earliest leaders to extend Zero Trust into cloud and operational technology environments.

Before joining Zscaler, Tony led an award-winning secure-cloud transformation. Today, he advises executives and security leaders on cyber resilience, digital transformation, attack-surface reduction and AI-native security. A prolific writer and international speaker, he is known for challenging conventional thinking and turning complex technological shifts into practical strategies.

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