AlliedBarton Security Services LLC is one of the largest security officer services companies in the United States. Located in Boston, Mass., the company offers its services to customers in a variety of industries, such as chemical and petrochemical; colleges and universities; commercial real estate; government services; higher education; healthcare; residential communities; manufacturing and industrial; financial institutions; shopping centers and other retail facilities. AlliedBarton Security Services LLC is a part of Allied Security Holdings LLC. The company operates more than 100 offices located across the United States.