Jaap J. Boonstra, "Sioo, Inter-university Centre for Organizational Change and Learning, Admiraal Helfrichlaan 1, 3527 KV Utrecht, The Netherlands
"Jaap Boonstra is a Professor of Organizational Change and Development in the Faculty of Social and Behavioural Sciences at the University of Amsterdam, The Netherlands. He is also Dean and Scientific Director of Sioo, Inter-university Centre for Organizational Change and Learning. Founded by the Dutch universities, Sioo has been the bridge between scientifically founded theory and the practice of organizational and change processes in the Netherlands since 1958. He is also a visiting professor in Esade Business School in Barcelona, Spain. He is a research fellow and member of the scientific staff of The Netherlands School of Communications Research and the Amsterdam School of Social Research.
After studying social and organizational psychology at Leiden University, The Netherlands, he obtained his doctorate with a thesis on integral organizational development and management of complex change processes. Previously, he was Associate Professor in organizational psychology at Leiden University, and hasworked as a consultant, researcher, and managing partner at the Research Foundation for NewTechnology and Organizational Development.
He lectures on the management of change, strategic decision-making, power and politics in organizations, and organizational learning. He has conducted research into the social and organizational aspects of technological innovations, sustainable development and change of organizations, strategic decision-making, and innovation. His research interests focus on barriers to organizational change andinnovation, power dynamics in organizational change, sustainable development of organizations, democratic governance, and societal development.
He has published over a hundred articles on technological and organizational innovation, management of organizational change, organizational learning, politics in organizations, strategic decision-making and fundamental change programmes in the service sector, and public administration in the "Academy of Management Review," "Concepts and Transformations," the "European Journal of Work and Organizational Psychology," and "Applied Psychology: An International Review," He is a member of the editorial board of several journals. Recently, he published a book on designing and developing organizations, and edited a special issue of the "European Journal of Work and Organizational Psychology" on power dynamics and organizational change.

LEon de CaluwE is senior partner with the Twynstra Group, management consultants and part time professor at the Free University in Amsterdam.

LEon de CaluwE (1950) studied social psychology at the University of Utrecht. He received his science degree in 1975 and his Ph.D degree in 1997 at Tilburg University. He was appointed professor in Amsterdam in 2000. He leads the Center for Research on Consultancy at the Free University, which is part of an international network. He regularly works as expert for the OECD and the Council of Europe.

At Twynstra Gudde (where he works since 1988) he is member of the thinktank of the company.

In his work he is specialized in change, conflict resolution, quality of cooperation, culture-interventions, facilitation of policy development sessions. He works regularly with gamesand gaming metods as an intervention for advanced learning.

He works for all types of clients, in government and in industry.

He published more than 80 articles and more than 10 books. Several of them are in English, e.g. 'Changing organizations with

gaming/simulation' (Elsevier publishers, 2000). The subjects are: change, consultancy and interventions.

His dissertation: "Veranderen moet je leren" (1997) received the Best-book-of-the-year award by the Dutch Association of Management Consultants.

He is member of the Academy of Management, editor of several scientific journals and lecturer in many postgraduate and Masters programs.