This sector comprises establishments primarily engaged in managing companies and enterprises or holding the securities or financial assets of companies and enterprises in order to have a controlling interest in them or influence their management decisions. They may undertake the function of management, or they may entrust the function of financial management to portfolio managers. This sector also comprises: -Establishments that support the day-to-day operations of other organizations by managing, hiring, and placing personnel; preparing documents; taking orders from clients; collecting debts; arranging travel; providing security and surveillance; cleaning buildings; and packaging and labelling products. These activities are often undertaken in-house by establishments found in many sectors of the economy. -Waste management establishments primarily engaged in the collection, treatment, and disposal of waste material, the operation of material recovery facilities, the remediation of polluted sites, and the cleaning of septic tanks.