The OneBerry RoboGuard is a series of security robots for indoor and outdoor applications. The robots come with two base models (indoor and outdoor) with modular units for drivetrain, power and security functions. With this modular design approach, we created a family of security robots with an array of customization options for different security functions and scenarios. The final design outcome is a family of robots which would be pleasing and friendly for indoor (malls and offices) deployment, yet rugged and tough enough for the outdoor (industrial, public) environment in other configurations and guises. The robots are being deployed in various public spaces in Singapore and can be seen in MRT stations, offices and shopping malls.