Academic-researcher-led public engagement and consultation on new biotechnology provides information about new biotechnology to the public, and solicits their attitudes, beliefs and understanding about the technology. A burden associated with the democratic ideals of transparency and accountability encourages researchers to provide accurate information to the public. Less recognized is their role as actual, or perceived, authorities to provide new knowledge and to make policy or regulatory decisions. This paper focuses on the first of these two – the conflation between expertise on the subject of the engagement and the authority to represent that subject in an engagement process. While expertise, or at least accuracy in portraying expert knowledge, is consistent with transparency and accountability, it is argued here that authority in the representation of expert knowledge may be inconsistent with the intent of public engagement and consultation.