This course integrates empirical and functional aspects of the therapeutic process when intervening with individuals with co-occurring mental illness and psychoactive substance use disorders. Students learn to employ core clinical interventions and treatments modalities. Students must demonstrate a high level of competence in clinical and psychosocial interventions used with co-occurring disorders will be examined closely. Ways an individual's experience of trauma complicates clinical work will be stressed. Unique ethical and boundary issues will be addressed.