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The Early Days

Sometimes when I get quiet and still, I can't help but think back to the early days of Pennington & Trim and just smile. As [...]
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Remember When …

As I get older and look back, I often think of the early days of Pennington & Trim. I remember getting in my 1985 Isuzu [...]
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MAA Encourages Parents to Protect Children from Household Hazards

The Mississippi Alarm Association provides tips for keeping children safe at home. As a parent, keeping your children safe is your most important job. And, [...]
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Protecting your family and personal property is an important priority. If you are looking for the best alarm company in Mississippi look no further than Pennington & Trim Alarm Services. We have been providing home security systems across Mississippi since 1987.

How do we differ from other alarm companies? First, we provide top-quality security systems and monitoring with no contract. We provide up front pricing for all our equipment and installation in addition to monitoring services for a regular monthly fee. Our customers have the ability to terminate their security monitoring with written notice at any time without a penalty.

Second, we are a locally-owned and operated company. Not only are we the best alarm company, but we are the largest privately-owned in Mississippi. In addition to home security monitoring, we also provide security camera systems, access control, home automation, and fire systems.

Since 1987, there is a reason why we have over 15,000 customers in Mississippi. Learn more about our services, view our client list, or read first-hand testimonials from some of our loyal clients. You’ll soon get a feel for why Pennington & Trim Alarm Services is the best choice for your home or business.

Home Cameras
Pennington & Trim’s Remote Video Monitoring can provide peace of mind in more ways than one.

Home Automation
Pennington & Trim allows you to keep tabs on your home even when you can’t be there. Control your thermostat, locks, and your security system remotely.

Security Systems
Our home security and fire alarm systems are designed to keep you and your family protected.


At Pennington & Trim, we don't believe in contracts. You can cancel your monitoring service at any time by providing a written notice.


Your security is important. Not just on weekdays, but nights, weekends, and holidays.

Low Monthly Fees

We understand the value of a dollar and strive to provide you the best service at the lowest price.

We are proud of the fact that since 1987, we have only increased our rates twice.


Remotely arm, disarm or check the status of your security system.

Why Pennington & Trim stands-out among others



We have been serving Central Mississippi with excellence since 1987.



We are the largest privately-owned security company in Mississippi.



Our reputation has produced outstanding customer loyalty.



We don’t believe in contracts.
Terminate in writing at any time!

Customers That "Let Us In"