Syon Security

SYON Security Limited is a technically driven cybersecurity firm based in Hong Kong, specialising in adversary simulation and red teaming. We conduct full black box and grey box attack simulations against critical infrastructure sectors—including aviation, energy, banking and finance, rail, and maritime. Our certified offensive security experts emulate real-world threat actors to uncover blind spots across your entire defense stack. We assess not just technology, but also your people and processes—to provide a holistic view of your cyber resilience. We serve clients globally across the US, Europe, Middle East, Africa, Oceania, Hong Kong, and Greater China. Core Services: • Red Teaming • Adversary Simulation • Penetration Testing • IoT & OT Security Testing • Purple Teaming • Incident Response