 A co-investigator Dr. Hutton trained in clinical psychology with extensive experience with HIV-infected persons with substance abuse will serve as the clinical supervisor for peer navigators. She will be responsible for organizing regular clinical supervision sessions to review case studies, address issues of PNcounseling overlap and discuss issues arising from the execution of the work. These sessions should be a mix of group and individual level supervision. The clinical supervisor should help PNs deal with issues of setting boundaries with participants and developing methods for dealing with urgent issues. Clinical supervisors will ensure that clinical assistance is available for PNs when situations arise in which a licensed mental health workers assistance is needed. Additional support will be provided by clinicians and HIV care providers who have been trained to address the specific medical needs of IDUs. 