Transdisciplinary ProblemsProfessional practices occur in workplaces, social systems that confound simple analysis, where things change and turn messy. There are many disciplinary approaches to take (e.g. anthropological, psychological and sociological) but, I propose, attempts to determine what and why things happen within professional practice prove difficult from any single disciplinary and epistemological perspective. I take these transdisciplinary problems to be issues that are complex and involve societal concerns, which lose their very nature when deconstructed to simple disciplinary interventions and, indeed, confound such mono-disciplinary interventions. These issues need to be taken at their face value, informed by a range of knowledges and resolved within the constraints of the socio-political context that, in many cases, created them.Transdisciplinary issues require professional engagement in a wide range of professional contexts. Mitrany and Stokols (2005) point to the sectors of urban planning, public policy and environmental management that, they state: long have understood that complex problems such as community violence, environmental degradation, transit-related injuries, sustainable development and urban change are unlikely to be resolved in the absence of efforts to integrate knowledge drawn from several different disciplines. (2005, p. 437) P. Gibbs ( )