Enterprise systems modelling requires integrated views of both technical systems as well as organisational systems that together will deliver the anticipated capabilities. A major challenge in such modelling is the expression of ‘soft’ or human aspects of the organisation where measures seem intangible, behaviour unpredictable or constrained to ad-hoc, qualitative assessment. In particular, although most businesses are concerned with managing organisational culture, how can these cultures be modelled in a manner that enables it to be integrated with the holistic enterprise system model in order to drive assessments and yield insight for managers? Initial modelling efforts showed that many aspects of organisational culture could be modelled and integrated successfully within wider enterprise systems modelling. This paper describes a Model-Based Systems Engineering approach to the development of organisational culture models and demonstrates how changes made to the integrated enterprise model may yield insight into how organisational culture will need to evolve as enterprise systems transform.