Security Doctors of Illinois protects homes & businesses with advanced security systems in Chicago and the surrounding metropolitan area. You can set the exact level of security you want, or we can build a system based on your needs. Experience 24-hour peace of mind as our award-winning Monitoring Center keeps your property secure, day and night. In addition to monitoring Chicago security systems, this state-of-the-art facility protects thousands of properties nationwide. Our Authorized Security Professionals are skilled, courteous, highly trained, and happy to assist you at all times. If you're looking for security companies in Chicago or the surrounding region, we offer the expertise, technology and quality service you need.