In this study the Delphi technique was used to identify the main supervision issues that require attention and consideration when supervising counsellors and psychotherapists working with trauma. A panel of supervisors, who were additionally experienced in working with trauma in adulthood, completed a series of three questionnaires comprising two qualitative and one quantitative round. Themes and key concepts were identified from the data, and the respondents rated the importance of the themes using a visual analogue scale. This iterative process identified areas where there was consensus amongst the respondents and areas where contention was apparent. The results revealed significant issues pertinent to the supervision of trauma therapists, with a particularly strong emphasis around training, experience and organisational issues. Directions for further research emerging from the study are also discussed. (Contains 2 tables and 1 figure.)