Organizations with which van der Leeuw is affiliated
- Albaeco — Turning science into knowledge on the interactions of man, nature and society
- Archaeomedes Project (1992-1994) — Understanding the natural and anthropogenic causes of land degradation and desertification in the Mediterranean Basin
- Archaeomedes II Project (1996-1999) — Degradation and desertification in the Mediterranean
- Centre National de la Recherche Scientifique — Science de l'Homme et de la Société (France)
- International Long-Term Ecological Research (ILTER) — Network formed by international representatives of scientific programs or networks that focus on ecological research over long temporal and large spatial scales
- Global Institute for Sustainability, Arizona State University
- MEDRAP — Concerted action to support the northern Mediterranean Regional Action Program to Combat Desertification
- Resilience Alliance — Research on resilience in social-ecological systems; a basis for sustainability
- Santa Fe Institute: Emergency, Innovation & Robustness in Evolutionary Systems — Supports the study of robustness in natural, engineering and social systems.
- TiGRESS — Time-Geographical Approaches to Emergence and Stable Societies
