This quantitative study investigates linkages between integrative learning experiences provided by student-run firms and fostering professional self-efficacy or the confidence to do one's job effectively and efficiently. Based on a survey of 182 students involved in student-run agencies, this research measured students' professional self-efficacy (confidence) in being able to perform 23 communication tasks. It also measures attribution respondents award to their student-run agency experiences in attaining that confidence. The study suggests changes to pedagogy and provides evidence for the effectiveness of student-run firms in preparing graduates for responsibilities in the professions of advertising, public relations, integrated communication, and strategic communication.