Objectives: The proposed study will examine intensive case management for homeless Veterans in addiction treatment by integrating addiction/housing case managers (AHCM), operating from a Life Skills Training perspective, into an addiction specialty program. The primary aim is to determine whether the AHCM intervention increases number of days housed during the year following treatment entry. Secondary aims are to compare costs and cost-effectiveness of AHCM vs. time and attention control, determine if AHCM improves addiction outcomes and functional status, and examine treatment process variables associated with improved outcomes.