International administrative law deals with legal recourse within public international organizations in respect of conflicts between employees (international civil servants) and the organization itself. Literature in this field of public international law is relatively scarce and jurisprudence is not easily accessible. Following a short survey of the main particulars in international administrative law this article will present a recent case in which the Appeals Board of the European Space Agency (ESA) rendered a decision. It deals with some typical legal issues which play a role in international administrative procedures. For practitioners, in particular, this case is an interesting example, of how international tribunals solve legal questions in respect of jurisdiction and substance.