The Design and Engineering Methodology for Organisations (DEMO)method is a core method within the discipline of Enterprise Engineering (EE). It enables the creation of so-called essential models of organisations, which are enterprise models focusing on the organisational essence of an organisation, primarily in terms of the actor roles involved, and the business transactions between these actor roles. The DEMO method has a firm theoretical foundation. At the same time, there is increasing uptake of DEMO in practice. This also results in a need for enterprise-grade tool support for the use of the method. In this experience paper, we report on experiences in selecting and developing tool support for the practical use of DEMO.