The viva examination or ‘defence’ is a pivotal moment in a student’s or researcher’s career. It marks the conclusion of one stage and the beginning of another, whether during the study period or when competing for research funding. Unlike many other formal assessments, the viva is an oral performance. Its form may strongly depend on the domain of science or knowledge sector, on the university or even on faculty. The rituals of interaction between jurors and candidates may differ in many cultural contexts. Yet, the core elements of the defence are the debate, the use of evidence, and the justification for a statement or opinion delivered orally, are common to all. Accordingly, although a successful defence is about content, it is also about language and attitude. In academic education, there is insufficient preparation for this moment when one is in front of jurors, a commission, and even a wider audience. We draw on our combined experience in our own careers and in their coaching of students to present an analysis of the ‘viva’ process. Our findings may help candidates position themselves in the viva context and offer practical advice on how to prepare, define an attitude, and structure answers and responses in general.