Several blogs and articles have discussed the increasing reluctance of employees to take vacation time, even if it is mandatory. While reading these articles, I cant help but notice a lack of discussion about the security implications of this.
Internal investigators will tell you that a employee refusing to take vacation time, or refusing to take a large amount of time at once can be a red flag.
An employee committing embezzlement, fraud, stealing data or otherwise manipulating books or records needs to have continuous control over those systems to maintain the theft and avoid being caught.
In fact, many aspects of what we consider to be model employee behavior can actually be a red flag:
Volunteers often for new projects and duties; particularly in security, finance, or record keeping duties. Often these duties, like processing receipts for reimbursement, are the least desirable duties. After a few volunteer projects, a manager might find that least privilege and separation of duties policies may be being circumvented.
Early in, late out. First in and last out employees have access to files, computers and offices with little or no security or monitoring measures. The employee offering to make coffee in the morning maybe up to something more than making sure the office is perky.
Constantly remaining in touch while on vacation, doing work while on vacation, and working overtime before and after vacation. These may all be attempts at communicating with someone in collusion with the fraud, or at maintaining control over the work product. If your employee insists that he or she completes all work before going on vacation instead of handing over the materials to another employee, this could be cause for concern.