International administrative law, or more precisely the law of the international civil service, has been the focus of increased attention in recent years. A part of the discussion has focused on the design of the justice mechanisms of international organizations, exemplified by the overhaul of the internal justice system of the United Nations in 2009. The internal justice systems of some international organizations have been subjected to scrutiny before some national courts, and the role and contribution of international administrative tribunals to the development of the law continue to be an important part of discussions of good governance and accountability of international organizations. The essays in this book, written by judges, practitioners, academics and other experts, address these and other issues.