About us

Who is Pennington & Trim?

Pennington & Trim is proud to be one of the largest privately-owned alarm companies in Mississippi. Located in Flowood, MS, we are locally owned and operated. We service clients throughout the state of Mississippi. We are a Christian company. We bring the tithe of every single dollar this company makes to the local church. We also support missions around the world. Our ultimate goal is to make money to help spread the gospel.

Company History

Pennington & Trim Alarm Services, Inc. was founded in the fall of 1987 as a partnership between Norman Pennington and Ed Trim. In the early days, the work was done out of Ed Trim’s house using his storage room as a stock room. The company has grown tremendously over the decades and eventually expanded into the current location.

We have truly been blessed with great customers referring us to their friends, relatives and neighbors. We’ve been blessed with great builders that call us every time they need a security system installed in a new house under construction. We have been fortunate enough to accumulate over 19,000 customers throughout the state of Mississippi. We are one of the largest alarm companies in Mississippi. However, we still remember that little small room where it all started back in 1987 and all the hard work it took us to get to this point.

Ed Trim

CEO & President, Pennington & Trim Alarm Services Inc

Pennington history
Pennington & Trim today

Pennington & Trim today

A Message from Ed Trim, President and CEO

“Pennington & Trim has been protecting homes and businesses in Mississippi since 1987. We’re a local company and customers trust us. We offer dedicated customer service and we use only the latest technology in all of our security products. We don’t believe in long-term contracts. We believe you’re only as good as last month’s service.”

“So call us. Let us in. We’ll keep them out.”


A few of our commercial customers

  • ER1-800 Radiator & A/C
  • Automated Power, Inc.
  • Bob Boyte Honda
  • Brandon Discount Drugs
  • Calvary Baptist Church
  • Climate Masters
  • Coast Electric Power Association
  • Edwin Watts
  • Flowood Chamber of Commerce
  • Hartfield Academy
  • Jackson Healthcare for Women
  • MS Sports Hall of Fame & Museum
  • Material Girls
  • Morgan White Group
  • Northside Sun
  • Rick’s Pro Truck
  • Ridgeland High School
  • SERVEPRO of Brandon
  • State Farm / Malcolm Houston
  • Street Smart
  • Tinnin Imports
  • Upton Tire Pros
  • Word of Life Church

Please contact me.

Do you have a need for your home, business or facility?  Ask us a question, request a quote of just leave us a message. We’d love to hear from you!

With our 36 years of experience serving 19,000 customers, we know a thing or two about security systems.

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