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Owned and operated by the Post Family for over 50 years, we are proud to be one of the oldest, largest and most respected privately held firms in California dedicated to customer satisfaction and long-term client relationships. With over 50 years of experience, you can count on us for quality installation, state-of-the art monitoring and armed security patrol services.


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At Post Alarm Systems our commercial installations cover the whole range of client needs for protection. From systems for small retail shops to highly complex, sophisticated systems for high-rise office complexes, our highly trained security and fire engineers will design a system that fits the needs of your organization.


We know your home and your loved ones are, after all, your most precious assets. Having peace of mind knowing that what you value most is safe and secure can be priceless. That is why a home security system is one of the most important investments you’ll ever make.
Call us for a free consultation and estimate today.

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Emmy-award winning Judd McIlvain is one of the most trusted consumer investigative reporters in the U.S. We were honored when Mr. McIlvain interviewed our company and brought Post Alarm on as a member of the elite “Trouble Shooter” team.
Click here to view the video

Post Alarm offers an exciting new product called Videofied, a wireless motion detector/camera that sends real time 10 second video clips to our monitoring center. Since the alarm is verified police respond immediately increasing the odds of capture. Watch how Videofied assisted in the capture of three criminals in one week.

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