TA Associates and Insight Partners-backed PDI, a software company, agreed to acquire the Managed Security Services unit of Thompson Street-backed ControlScan, a provider of managed security and compliance solutions. Financial terms were not disclosed. "Our customers are facing increasing complexity as they adopt new technologies and leverage data to deliver better customer experiences. We look forward to bringing together the solutions and expertise from Cybera and ControlScan MSS to provide trusted security solutions to our customers," Jimmy Frangis, PDI CEO.