The use of object technology (OT) has been highly successful for many software development companies, yet there are still a large number of organizations who have not yet adopted OT. For those companies currently adopting object technology, the transition from traditional procedurally-oriented technologies remains a challenge. Indeed, there is sparse empirical evidence to suggest the best ways to undertake this culture change. Here, we reports on action research results of two case studies within the software development arm of a large multinational professional information solutions provider. The company used the Trans-OPEN process for their transition process. This transition process has seven major activities: initiation, planning, technology insertion, deployment, the use of a retrospective for evaluation, improvement planning and further improvement. the process is incremental and iterative. Furthermore, the case studies underline the need for a more formal approach to culture change in the context of the adoption of object technology.