This paper describes a conjoint, collaborative training and supervision model designed for undergraduate psychology trainees. The Paraprofessional as Companion Therapist (PACT) program provides an internship experience for undergraduates who work directly as outpatient therapeutic companion-aides with university counseling center eating disorder clients. Trainees are closely supervised by two doctoral level psychologists: the onsite therapist and the academic intern supervisor. Supervision is done conjointly using a group framework and case presentation format in which client contact is monitored and prescriptive interventions are provided. Client outcome measures are used to measure trainee's effectiveness and response to supervision. Paired responses to a client change scale compares client and trainee ratings of therapeutic change. (Forty-four references are included, and data are displayed in one table and three figures.) (Author)