Graham Partners completed the acquisition of Gatekeeper Systems, which provides high resolution video security and safety systems for mobile applications, from Hammond, Kennedy, Whitney & Company, a middle-market private equity firm. Financial terms were not disclosed. “Gatekeeper is a great platform for add-ons and we were pleased to provide the resources and capital required to complete three acquisitions. This strategy helped us develop new technologies and quickly push Gatekeeper solutions to new markets, especially internationally,” Chris Eline, Principal at HKW.