The literature on interdisciplinarity identifies several forms of collaboration: multidisciplinary, transdisciplinary, and interdisciplinary (as bridge building or integration). To assist vocational psychology translate its interdisciplinary discourse into action, this paper uses that literature to identify the benefits, challenges and conditions for success. It indicates that the form of collaboration needed must be decided, and the cognitive, social, organizational and institutional aspects of the collaborating disciplines considered. It highlights the significance of interpersonal relationships when establishing and maintaining collaboration.