One of the less obvious and most challenging of threats are the many employees, volunteers and contractors who have unrestricted internal access inside the organizational perimeter. Those within the trusted workforce who, for one reason or another, take actions or engage in behavior that negatively impacts the safety and security of the very organization they work for. Commonly referred to as “insider threats”, these employees and contractors become vulnerable to exploitation, susceptible to commit bad acts or, at a minimum, are distracted in the performance and execution of their jobs. This is the human side of insider threat, and regrettably, most organizations do not address this rising concern within their layered security approach. Surprisingly, many simply rely on a static background investigation prior to hiring, then assume a level of trust for the tenure of employment. This practice has proved catastrophic across public and private sectors alike.