KOL Systems, Inc. :: About Us

KOL Systems is a hybrid service model. We are direct agents for Diebold Nixdorf, providing direct order entry of Diebold Nixdorf products and services into the Diebold Nixdorf system for our customers. However, electronic security products and services including intrusion alarms, video surveillance, equipment and service, and alarm monitoring are provided exclusively through KOL Systems. G+D currency units are also distributed exclusively by KOL Systems.

KOL Systems has been Diebold Nixdorf sales agents for more than 25 years. Principals of the company are Harry Barrett and David Holmes. Harry started with Diebold Nixdorf in 1989 later joining with David, who joined in 1992, creating KOL Systems in 1999.

“Our values and our desire to serve our customers, are the reasons we formed KOL Systems and have kept us going strong for over 25 years in this industry.” -Harry Barrett

“Our many years of serving customers has proved that we are large enough to serve but small enough to care.” -David Holmes

The creation of Diebold Nixdorf represents more than a combination; it’s a new organization for a transformative era. For more than 150 years, we have been determining the future, guiding our customers strategically for the long term, and forging the path for innovation.


Click the links below to visit vendor websites to gain access to software/firmware updates.

DMP Alarm Updates
Costar Video Systems Updates


Click the links below to download the following forms if you need them.

KOL Systems Event Monitoring FormSCAN Form