Brett Williams is a cyber threat intelligence and cybercrime specialist with over 30 years of experience in IT and security. His expertise spans insider threats, incident response, fraud, cryptocurrency crime, and the dark web, where he has tracked threat actors and underground marketplaces. Brett has held senior roles with leading organisations, including SentinelOne, Fortra, Chainalysis, Flashpoint, Carbon Black, and RSA. He is a co-organiser of BSides Melbourne, an active mentor for emerging professionals, and a regular speaker at events such as the AISA Conference, RSA Conference, and AIPIO Intelligence Conference. Brett is widely recognised for delivering practical insights into how cybercrime ecosystems operate and how organisations can respond.