The paper describes an industrial application of behavior-oriented robotics, the so-called RoboGuard. It is a mobile security device which is tightly integrated into the existing surveillance framework developed and marketed by Quadrox, a Belgian SME. RoboGuards are semi-autonomous mobile robots providing video streams via wireless Intranets to existing watchguard systems. Robo-Guards fill several market-niches. Especially, they are a serious alternative to the standard approach of using Closed Circuit Television (CCTV) for surveillance. Low production cost and user friendliness were two important design targets for the actual mobile base of the RoboGuard, which were achieved by following the AI paradigm of behavior-oriented robotics.