External thieves fight your perimeter; insiders already own it. They know the blind spots, the shift patterns, the supervisor who never checks the trailer seal. Insider theft is patient, repeatable and often collusive — goods leaving in legitimate vehicles on falsified paperwork. Defeating it is less about fences and more about verified process: nothing moves without matched documentation, and every exception gets examined.
Gatehouse discipline is the foundation: every vehicle, driver, seal and load verified against booking data, with ANPR logging every movement. Randomised searches of vehicles, bags and lockers — clearly communicated in policy — remove the predictability insiders exploit. CCTV analytics flag unusual dwell times and out-of-hours access. Agency workforce screening closes the revolving door, and anonymous reporting channels surface what colleagues see but fear to say.
Crucially, the data must be read. Shrinkage reporting that sits unopened in a drawer protects nothing; weekly analysis by time, zone, product and shift turns incidents into patterns, and patterns into targeted controls.
“The midnight break-in makes the news. The Tuesday-afternoon shrinkage makes the loss report.”
Sites with the lowest shrinkage share a culture: fair searches applied to everyone from picker to director, visible consequences, and supervisors who treat security as operations rather than overhead. Security officers who know the workforce by name spot the stranger and the changed behaviour that cameras never flag.
