This introductory course on Insider Threats is designed to equip participants with a foundational understanding of insider risks, the behaviours associated with insider threats, and the strategies to mitigate these risks. The course covers a broad spectrum of topics, including the unique challenges that insider threats pose to critical infrastructure sectors. It is targeted at security professionals, organisational leaders, and employees who need to be aware of the potential insider threats within their organisations and the broader implications for national security and public safety.