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Sentinel the Alarm Company Truck | Home & Business Security Experts

The Sentinel Story

Proudly Securing Dallas-Fort Worth For Over 50 Years

Since 1968, Sentinel the Alarm Company has been family owned and operated and providing effective security solutions to thousands of homes and businesses in the Dallas-Fort Worth Metroplex. Founded on principles of professionalism and personalized service, our staff at Sentinel has maintained positive, long-term relationships with our customers for more than 50 years. We have a reputation for quality and history of excellence.

Let us help you find a solution to your security needs today!

What Makes SentinelSafe™ Security Different?

Family Owned & Operated Since 1968

Now run proudly by our second generation of security systems experts.

"No Worry" Maintenance Service

Our technicians are the best at maintaining security systems with no added stress to you.

Licensed & Insured Technicians

All Sentinel technicians are FBI background checked, drug-tested, and continuously recertified.

Local, State-Of-The-Art Monitoring

Our dispatchers have maintained a track record of uninterrupted excellence since 1989.

Easy Equipment Financing

Equipment financing can help you benefit from Section 179 tax advantages.

Security Association Leaders

We are active members in the top Dallas-Fort Worth alarm associations.

Dallas-Fort Worth's Trusted Security Systems Experts

See what our satisfied customers are saying

Patricia GPatricia G
15:51 11 Feb 22
Let me tell you about a positive experience I had had recently as your Service Manager, Donny, was finishing up with upgrading my Sentinal Alarm System. As we began to settle my bill, I began to cry uncontrollably. Donny was very supportive of my personal crisis and offered to keep me in his prayers. Later that day, I began to feel better. Donny thinks outside the box, which, in my opinion, is the best kind of employee for a company to have. Thank you Donny, for your healing prayers and for thinking outside the box.
Jaycile BrannanJaycile Brannan
22:16 17 Jan 22
We have used Sentinel for 20 years. They have done a great job. They are very responsive to our needs and Donny has always done a fantastic job for us. We highly recommend Sentinel
Gaynell KellumGaynell Kellum
12:41 20 Aug 21
Donny did a great job for us! He is so knowledgeable and personable. We couldn’t be happier with the service!
Anne LongAnne Long
18:19 17 Aug 21
Chuck was great- the nicest man. Thorough and took the time to make sure I understood my new system.A positive experience from start to finish with Sentinel. Highly, highly recommended!
Jan FletcherJan Fletcher
12:13 08 Jun 21
These people are great. Very responsive and timely.
Dan GoldDan Gold
21:21 24 May 21
Mike did a quick diagnostic and was able to fix my repair without any issues. He was courteous and very professional. I would highly recommend this company and Mike for any alarm issues.
Patricia GPatricia G
15:51 11 Feb 22
Let me tell you about a positive experience I had had recently as your Service Manager, Donny, was finishing up with upgrading my Sentinal Alarm System. As we began to settle my bill, I began to cry uncontrollably. Donny was very supportive of my personal crisis and offered to keep me in his prayers. Later that day, I began to feel better. Donny thinks outside the box, which, in my opinion, is the best kind of employee for a company to have. Thank you Donny, for your healing prayers and for thinking outside the box.
Jaycile BrannanJaycile Brannan
22:16 17 Jan 22
We have used Sentinel for 20 years. They have done a great job. They are very responsive to our needs and Donny has always done a fantastic job for us. We highly recommend Sentinel
Gaynell KellumGaynell Kellum
12:41 20 Aug 21
Donny did a great job for us! He is so knowledgeable and personable. We couldn’t be happier with the service!
Anne LongAnne Long
18:19 17 Aug 21
Chuck was great- the nicest man. Thorough and took the time to make sure I understood my new system.A positive experience from start to finish with Sentinel. Highly, highly recommended!
Jan FletcherJan Fletcher
12:13 08 Jun 21
These people are great. Very responsive and timely.
Dan GoldDan Gold
21:21 24 May 21
Mike did a quick diagnostic and was able to fix my repair without any issues. He was courteous and very professional. I would highly recommend this company and Mike for any alarm issues.
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24/7 Emergency Services Available

Speak With A Sentinel Security Expert.

Please give us a call, or fill out this form and a Sentinel security expert will call you promptly.

Our expert sales and service staff is available during regular business hours from 8:00am to 5:00pm Monday through Friday to assist you. If you have an after-hours request, a technician will be dispatched to contact you, and respond to your location with a fully-stocked service vehicle if needed. Our goal is to keep your security systems and services operating 24/7.

Corporate Office

Local: (972) 644-6866

Toll-Free: (800) 275-6866

Monitoring Center

Local: (972) 644-9575

Toll-Free: (800) 713-6475

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