Company History

Guardian Alarm continues to be an innovative, dynamic security company with industry-leading standards and practices.
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1930

During the Great Depression and at the age of 15, Milton Pierce started a burglar alarm company in his neighborhood. A few years later, he expanded and purchased Guardian Alarm in Detroit, Michigan.

1970

The Guardian Guard Services division is established to provide physical security throughout Michigan and Ohio.

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1975

Guardian Alarm is ranked the 14th largest security company in the United States and has continued to be top-ranked.

1980

The Guardian Armored Security division is established to provide armored car and cash processing services. This division was sold in 2007.

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1982

Automatic Alarm and Certified Alarm, both owned by Milton Pierce’s sons Richard and Douglas, merge with Guardian Alarm.

1999

The Guardian Medical Monitoring division is established to help seniors with personal help buttons, medication management and wander management devices.

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2004

The Guardian Alarm division expands into Florida through acquisitions of several security companies.

2006

Guardian Alarm is ranked the 14th largest security company in the United States and has continued to be routinely ranked in the top 20.

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2010

The Guardian Alarm founder, Milton Pierce, passes away at the age of 95. A true pioneer, Milton set the example with his motto of, “Give the customer good service, take good care of them and they will take care of you.”

2011

The Guardian Alarm division expands further into Ohio through the purchase of Complete Protection from Cincinnati Bell.

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2015

The Guardian Alarm family proudly celebrates our 85th Anniversary and we look forward to continuing the legacy of innovation and industry-leading standards.

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