I have been working for many years as a systems modeler, professional trainer, facilitator, researcher, and game designer. I am particularly involved in linking theory and practice, science and policy, knowledge, and action through diverse systems and knowledge management tools. I have been applying and teaching systems tools with diverse groups of scientists, NGOs, businesses, and administration in many countries.I designed and applied many simulations and role-playing games addressing the issues of sustainable development.Specialties: Social Simulations, System Dynamics, Resilience Theory, Participatory Modeling, Strategy and Policy Development, Game Design