Owned and operated by the Post Family for over 50 years, we have become one of the largest, most respected full service security and fire companies in Southern California.

Our Orange County Alarm System Services

Our People Make the Difference

When it comes to the safety of your home or business, you should not waste any expense on an alarm system company or installation services that are not of the highest quality. At Post Alarm Systems, we understand the importance of knowing that your property, belongings, and family or staff are safe. Whether you are inside or on the go, you should never have to worry about vandalism, break-ins, or burglary. When you have one of our Orange County alarm systems installed, we provide you with the highest quality of service.

If you have worked with other alarm system companies, we understand that you may have been disappointed in the past, such as if you had a system that didn't live up to the necessary standards. You should be able to depend on your alarm system to work at all times, no matter what. We believe that you deserve peace of mind for your family and / or business, and one of the important steps to attaining that comfort is choosing the right alarm company. Our alarm system services are intended to meet all of your needs and to exceed your expectations.

Our services fall into the following two categories:

  • Residential services - Our priority is to provide your home with the maximum level of protection. In addition to the actual security system, we can provide you with added fire alarm features, video surveillance, and alarm response and patrol services.
  • Commercial services - We provide alarm system services for commercial properties of all sizes. We offer commercial security systems, commercial monitoring, and online system management. We can get your system set up even if you don’t have phone lines!

Family-Owned Business Serving the Area for Over Five Decades

With offices in Costa Mesa and Arcadia, we serve a wide range of residential and business customers throughout Orange County and the Los Angeles area. Our family-owned and -operated company has been around since 1956! We are committed to treating each of our clients as if he or she is our only client.

Do you have any questions about the services we offer and how we can be of assistance to you? If so, we would be pleased to speak with you and offer you an estimate on the alarm system that is right for your residential or commercial property. Please call us today at (626) 446-7159 for more information or to request an estimate!

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