This paper makes a case for the coining and exploration of a term 'decolonialism'. Although there is likely to be greater familiarity with the use of the term 'decolonization' for the work indigenous people might undertake on themselves to transcend the shackles of colonization, this paper suggests that colonizers also need to work at ridding themselves of vestigial mechanisms of control. The paper suggests the term 'decolonialism' to represent this challenge. However, the issues go deeper than the examination of a counsellor's personal beliefs, awareness and worldview, but also extend to the systems that underscore and guide the counselling profession. Whilst such issues are of relevance to various contexts around the world, this paper focuses on a case study of the reformation of the New Zealand Association of Counsellors-Te Roopu Kaiwhiriwhiri O Aotearoa as an example of the counselling profession striving to decolonialize its structure and its practices.