Prevention Care Advocate (PCA) intervention contains elements based on cognitive-behavioral theories and strengths-based case management. Intervention arm participants will undergo an 8 session intervention comprised of three components: 1) An individual strengths-based case management approach aimed at motivating participants to seek or maintain their engagement with HIV primary care and drug treatment; 2) A cognitive-behavioral, skills-building approach to increase participants' risk reduction knowledge, skills, and perceived self-efficacy as well as intention to change high risk transmission behaviors; and 3) A community placement in which study participants will have the opportunity to practice their advocacy skills in prevention and care setting.