This paper examines the stages of development for a framework of teaching assistant (TA) competencies initiated by the Teaching Assistant and Graduate Student Advancement (TAGSA) special interest group (SIG) of the Society of Teaching and Learning in Higher Education (STLHE). TAGSA initiated an iterative consultative process to inform the creation of the competencies that sought input from the STLHE community on four occasions. At each stage of the consultations, the competencies were formed and re-formed, their purpose and value debated, and the challenges of creating a development framework recognized. This process, described in this paper, resulted in a clear, succinct and flexible framework that can be used across institutions in multiple contexts.