Day & Zimmermann Security Services, a leading provider of managed security services, has notified that it has completed the acquisition of South Shore Security Systems.

South Shore Security Systems, Inc. is a Massachusetts-based leading provider of personalized, complete security and investigative services. Established more than 40 years ago, South Shore Security has earned a reputation for offering competitive, cost-effective security solutions.

Market watchers expect that the acquisition will expands Day & Zimmermann Security Services' presence in the Boston area, and bolster its portfolio in the commercial real estate industry.

Philadelphia-headquartered Day & Zimmermann Security Services is the 12th largest security company in the U. S., and provides managed security services, including armed and unarmed guards and roving patrols, to a diverse customer base of industrial and commercial facilities, utilities and refineries, corporate campuses, high-rise office buildings, and government agencies, among others.