A growing sociological and empirical literature focuses on lawyers as part of the globalization and transnationalization of law.Sociological approaches treat arbitration tribunals as embedded in society and arbitral awards as the product of a network of actors.A common creed of peaceful international dispute settlement binds together these actors. Arbitral tribunals are institutions that develop specific institutional and legal rationalities. This chapter draws together the existing scholarship on arbitrator behaviour with the aim of identifying gaps. Section II surveys the theoretical contributions on the sociology of international arbitrators. Section III surveys empirical studies on arbitrators.