This chapter provides a brief overview of civil society's development within Cambodia and an introduction to the relationship between that civil society and the Extraordinary Chambers in the Courts of Cambodia (ECCC). It analyses the means through which civil society actors have contributed to the ECCC's provision of both procedural and substantive justice to victims. The chapter considers some of the challenges associated with professionalised civil society's involvement. It focuses on the implications of a reliance of donors on the deliverance of services to victims and on the issues that may arise in relation to the privileging of professional voices over those of the victims themselves. Non-Governmental Organizations have also gone beyond reporting to engage in advocacy and activism, both outside the court and through their involvement in the civil party system. A series of amendments to the Internal Rules in 2010 led to some financial assistance being allocated for the employment of a limited number of court-funded lawyers.