This chapter describes the various roles and functions of the treatment program or clinical management staff in the residential facility. It characterizes the roles of support staff and agency personnel. Teachers, physicians, nurses, psychologists, social workers, lawyers, and accountants in the TC ply their professions in the usual way. The relationship between staff and peer roles is rooted in the evolution of the Therapeutic Community (TC). In the TC approach, the role of staff is complex and can be contrasted with that of mental health and human service providers in other settings. An array of staff activities underscores the distinctively humanistic focus of the TC. The chapter describes how primary clinical staff in the treatment program supervise the daily activities of the peer community through their interrelated roles of facilitator, counselor, community manager, and rational authority. Other staff provide educational, vocational, legal, medical, and facility support services.