About Us
Our History
Our Credentials
Superior Service
The Area We Service
Our Credentials
Our hard-working professionals truly define the company and its solid reputation. The majority of our staff is long-term employees who average nine years of tenure with us. In fact, the first employee that we hired is still with us today; and in total, we have over 500 years combined industry experience. We know that the key to a successful business is the dedication and expertise of dedicated professionals.
To insure top security, every staff member at Glessner is fingerprinted and undergoes an extensive federal and state background check to become a licensed security professional. Our workers possess clearances from the State Police, FBI and ATF.

We also recognize the importance of continuous training for our employees and provide opportunities for our staff to keep apprised of both new and futuristic technologies. We offer technical assistance and training to installers, sales professionals and service people so as to keep an active awareness of the industries developments. We’re always one step ahead of the industry.