The interaction between conflict management and ethics in organisations occurs in a web of power relations, organisational structures and the often conflicting objectives of organisational competitiveness and workplace justice. Human resource management (HRM) policies and practices have been pivotal in managing this interface. Key to the role of the HR manager is the management of conflict and delivery of justice in workplace decision making. We argue that ethical decision making to resolve conflict is challenged by the inherent nature of HRM. First, we note that in an environment driven by the need for efficiency, the HR manager is expected to perform a range of roles, particularly that of 'strategic partner' which can be at odds with its 'employee champion' role. Second, as someone who represents the firm, the HR manager cannot be considered a neutral mediator of conflicts between other workplace members. These tensions in the HR manager's role raise ethical questions that arise in the course of negotiation and dispute resolution. We commence with a discussion of workplace justice and the concepts of neutrality and impartiality. We argue while pursuing neutrality might have a shorter term goal of supporting managerial or organisational objectives, longer term goals, particularly those which enhance workplace justice, are likely to be afforded through the exercise of impartiality informed by an ethical code.