Twelve vocational rehabilitation clients with severe mental illness received a comprehensive adaptation of dialectical behavior therapy (DBT) delivered in a group format. Treatment consisted of 2 hours of standard DBT skills training per week and 90 minutes of diary card review, chain analysis, and behavioral rehearsal. Participants were selected based on previous failure to obtain or maintain employment. The participants had a mean of 3 psychiatric diagnoses each, and all participants met criteria for a personality disorder, with 58.3% having a diagnosis of borderline personality disorder. There were 4 dropouts and 8 treatment completers. The treatment completers improved significantly and maintained their improvements (at 6-month follow-up) in depression, hopelessness, and the experience of anger. In addition, the completers improved significantly from pretreatment to 6 months follow-up on anger expression, control of anger expression, work role satisfaction, and on number of hours worked weekly. (Contains 2 tables.)