Guardian Protection Services was founded in 1950 in Pittsburgh, Pennsylvania. The original name of the company was Guardian Alarm Services of Pittsburgh and, at that time, the company covered mainly jewelry stores.
Today, Guardian Protection Services is a nationwide, award winning security company. Russell L. Cersosimo bought the company in 1975 and, under his guidance, the company expanded and grew substantially. The company was purchased by Armstrong Security in 1991 and works as a subsidiary of its parent company.
The company has won numerous awards over the years, including the SDM Magazines Top 5 Best Alarm Companies in 2015, and it ranked among the Top 5 in the professional security system CEPro in 2013. Guardian Protection Services states they have more than 250,000 clients nationwide.