This article considers how a framework for understanding group and organisational behaviour, systems-psychodynamics, can be utilised by educational psychologists taking up an organisational consultancy role to work with schools as whole systems. It outlines the three main theories that constitute a systems-psychodynamic perspective and considers how the approach has been used by educational psychologists. Two case studies are presented that explore how psychoanalytic concepts such as splitting, projection, use of counter-transference, social defences and others can be applied. Key themes from the case studies are analysed and salient details discussed. The article then discusses implications for practice and further areas of study.