Onguard is a premier security guard company that at has been built on a solid foundation of Trust, Integrity and Unrivaled Reliance. Onguard is the most trusted and dependable security guard services company in California. Onguard Security Services is pacing to become the largest guard service providers in Southern and Northern California, Onguard specializes in providing security guard services to some of the largest residential communities and blue chip businesses. Our Goal is to provide our clientele with superb service that matches their ever changing security and protection needs. Onguard will go above and beyond what is promised to our clients to ensure that they are provided with top notch, professional security services."