Social work education has long emphasized the need to provide competence-based education. However, little work has been done to identify, validate and evaluate competencies in specific fields such as addictions. The purpose of this study was to isolate a set of substance abuse intervention competencies using Motivational Interviewing that could be used to teach and evaluate students. The research proceeded in three stages. First, a modified Delphi approach involving social work practitioners was used to discern a set of positive and dysfunctional skills related to Motivational Interviewing. The primary researcher taught a graduate social work class aimed at teaching students theory and skills related to this model. Students demonstrated these skills with simulated clients through videotaped interviews. Finally, three observers rated the student interviews using this developed instrument. While inter-observer agreement was lower than anticipated, this study does provide early support for the development of competencies related to specific theoretical frameworks.