The United Nations (UN) is an entity created by treaty with the ultimate goal of working in good faith on issues of common interest. The aims of the UN are the following: maintain international peace and security; foster international cooperation in social, cultural and economic terms; develop close relationships between nations based on the guiding principles of self- determination and equal rights; and recognise the fundamental rights of the entire world population. Conference interpreting is socially situated and carried out in a particular community of practice. This community takes the form of the organisation in which the interpreting takes place, and is characterised by the topics interpreted, as well as the profession's norms, culture and ideology. This chapter presents an overview of conference interpreting at the UN, from its beginnings to the challenges of the present day. It endeavours to provide an overview of the accreditation examinations, the various categories of interpreter employed by the organisation, the challenges involved and the working conditions.