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Post Alarm Systems

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United States
Arcadia, CA
Post Alarm Systems

Family-owned since 1956. Trusted security solutions in Southern California for 3 generations. Locally operated. Protection Your Way.

Founded in 1956 by retired police chief Sam Post, Post Alarm has been a trusted name in Southern California for home security and commercial security for three generations. With an approach that blends local expertise with leading technology, we deliver best-in-class security solutions including burglar alarm monitoring, video surveillance, live video monitoring, patrol and armed response services

, fire alarm monitoring, and more. We pride ourselves on delivering customized security solutions, professional installation and service, and exceptional customer service. Contact us to experience the difference that nearly 70 years of security company expertise can make for you peace of mind. Trust Post Alarm to protect what matters most to you.

09/07/2026

Happy from all of us at Post Alarm!

Today we're honoring the hardworking men and women who keep our communities safe and running — including our own patrol and security team, who show up rain or shine to protect what matters most. Enjoy the holiday with the people you love.🧡

09/04/2026

We've been seeing more break-ins across Southern California where burglars skip the front door completely and go straight for second-story windows and balconies, sometimes even while people are home. Cases in and both involved upper-level sliding doors that just weren't locked up tight.

The good news? A few small changes make a big difference:
• Move ladders, patio furniture, and anything else that could help someone climb up
• Lock upstairs windows and doors, even when you're home
• Trim back trees or branches near your roof or balcony

If you want an extra layer of protection, we can help with glass break detectors, security window film, and camera coverage that actually watches every angle — not just the front door.

Ready to lock down every entry point? Call us at (800) 654-7678 for a free home safety assessment.

09/02/2026

September is , and while a stocked emergency kit is a great start, true preparedness means knowing your home is protected 24/7. From smart security systems to real-time alerts, Post Alarm helps you build a safety plan that never sleeps. Because being ready isn't just about this month: it's every day.

Ready to get protected? Call us today at (800) 654-7678 and let's build your safety plan.

08/27/2026

Security isn't just about having a system; it's about having the right layers working together. 🛡️

Post Alarm unifies security into one synchronized platform: detection, video monitoring, access control, and patrol response.

✔️DETER: Visible systems discourage threats before they start
✔️DETECT: Sensors and monitoring catch suspicious activity early
✔️VERIFY: Live analytics + trained agents confirm real threats in real time
✔️RESPOND: Post Patrol and first responders dispatched fast

No two properties are the same, so no two systems should be either. Every plan starts with an on-site assessment tailored to your risks and layout. Schedule your free security assessment today: (800) 654-7678.

08/24/2026

Fire-rebuild sites are becoming just as much of a target as vacant homes: equipment, copper wiring, and building materials disappearing overnight while no one's watching.

The lesson is the same either way: cameras alone won't stop a theft in progress. It takes live monitoring and real patrol response to actually intervene.

If you're managing a rebuild in a fire-affected area, this one's for you 👇
https://postalarm.com/construction-remodel-site-security/

08/19/2026

Over the weekend, four masked men were caught on camera trying to break into a home at 11:15 pm: cameras, motion lights, and alarms all fired off, and they kept coming anyway. The homeowner ran downstairs himself to scare them off. "This is the second time on this street," he told KTLA 5 News . "It's easy prey."

This isn't isolated: it's part of a wider pattern. Post-disaster neighborhoods like Upper Hastings Ranch, still full of vacant homes after the , are seeing a real uptick in break-ins as criminals exploit the lack of neighbors and reduced visibility.

The lesson: this homeowner had cameras, lights, and an alarm — and it still came down to him confronting four strangers alone in the dark. Security is layers: detection (cameras, sensors) + deterrence (lights, alarms) + response (live monitoring and patrol). Miss that last layer and you're relying on luck.

As vacancy and rebuilding drag on in fire-affected areas, expect this trend to continue. Now's the time to double-check your own setup. Read the full story here: https://ktla.com/news/local-news/masked-men-caught-on-camera-trying-to-break-in-to-pasadena-home-residents-says/

08/14/2026

Crime is on the rise across LA, and burglars are looking for the easiest target. 🏠🔒

Signage, lighting, trimmed landscaping — these all help deter opportunists. But real protection comes from layered security: cameras, live monitoring, and patrol working together, so a threat never gets past just one line of defense.

One deterrent isn't enough. Post Alarm layers cameras, live monitoring, and patrol to keep your home protected, around the clock.

📞 Ready to see what layered security looks like for your home? Call us today for a free security assessment: (800) 654-7678!

08/12/2026

Two San Fernando Valley homes. Same night. Late-night burglars didn't hesitate. 🚨

This past weekend, LAPD responded to back-to-back break-ins: one in , one in , just miles apart. In one case, homeowners watched the burglary unfold in real time through their own security cameras while out of the country. In the other, intruders entered while a family was home.

Both incidents are a reminder: cameras alone tell you what happened. Layered security helps stop it from happening.

Post Alarm combines cameras, live monitoring, and rapid response — so threats are caught and acted on in real time, not just recorded after the fact.

📞 Don't wait for a break-in to find your home's gaps. Call us today for a free security assessment: (800) 654-7678!

07/10/2026

There's a crime wave moving through the , and it's not random.

Law enforcement is reporting organized, international burglary crews using fast entry-and-exit tactics, hidden surveillance cameras, and parked vehicles to study your routine before striking — often during dinner outings, school pickups, or travel windows.

The pattern is showing up from to to , and it mirrors what's happening across LA and Southern California.

Post Alarm stays on top of the latest crime trends so you don't have to — but staying proactive matters too. Strong outdoor lighting, monitored alarms, video surveillance, early perimeter detection, and patrol presence are still your best defense.

07/08/2026

Meet Alicia Garcia, our Central Station Manager!

For nearly 39 years, Alicia has been the heartbeat of Post Alarm, starting at our Pasadena branch under Lois and Bill Post themselves, and now leading the team that keeps our customers safe 24/7.

Alicia always wanted to be a police dispatcher. That passion led her to Post Alarm, where she's spent her career being a voice clients can count on — training every operator to live by one rule: "Always act like it's your family member's alarm."

Read Alicia's full story: https://postalarm.com/employee-spotlight-alicia-garcia/

Address

47 East Saint Joseph Street
Arcadia, CA
91006

Opening Hours

Monday	9am - 5pm
Tuesday	9am - 5pm
Wednesday	9am - 5pm
Thursday	9am - 5pm
Friday	9am - 5pm

Telephone

8006547678

Website

https://www.postalarm.com/

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