His research work is primarily concerned with software engineering, especially as applied to distributed computing. In addition, his research covers behavior analysis, the use of models in requirements elaboration and architectural approaches to self organising adaptive software systems. He was a principal investigator in the various research projects that led to the development of the CONIC and DARWIN environments for distributed programming and the associated research into software architectures and their analysis. The work on the Darwin Software Architecture led to its commercial use by Philips in their new generation of consumer television products.