The purpose of this qualitative, phenomenological study is to explore the perspectives of Speech-Language Pathologists (SLPs) and Behavior Analysts (BAs) related to their scopes of practice and their influence on collaboration. A methodological overview of qualitative, phenomenological interviewing will be described. Based on a collective analysis of the participants’ responses, several themes emerged related to barriers to collaboration between SLPs and BAs such as the following: (a) Influence of schedules and personality characteristics; (b) Lack of consensus of the relationship between behavior and communication; (c) Professional territorialism; (d) Perception of other professional’s level of competency; (5) Different theoretical backgrounds; and (e) Perceived inequities about insurance approval for therapy. The perspectives of SLPs and BAs are reported within each barrier to collaboration in order to provide further insight between these two professionals. Lastly, the importance of an interprofessional approach to collaboration when treating individuals with Autism Spectrum Disorders is reviewed.